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How to use fractions and multiplicatives in Spanish?

By: Natalia Molina Ceballos Fri Aug 30 2024
Spanish
Numbers

Fractions and multiplicatives are number expressions beyond cardinal numbers and ordinal numbers that you need to know to master Spanish. In this post we’re going to focus on these expressions and how to use them as nouns and adjectives. Not sure about what these numbers are? Look at the examples below to have a better idea:

La cuarta parte de los estudiantes aprobó el examen final.

The fourth part of the students passed the final exam.

En la conferencia de hoy tuvimos el triple de asistencia.

In the conference today we had triple the attendance.

If you need a refresher on cardinal and ordinal numbers in Spanish, check out: “Numbers in Spanish: How to form and write them?” Now, let’s go over how to make fractions and multiplicatives in Spanish.

Table of Contents

    What are fractions?

    They refer to fractions of a segmentable unit. They can be used as nouns or as adjectives. Let’s see each case in detail.

    Fractions used as nouns

    In this case, they’re always next to an article, demonstrative adjective, or cardinal number and followed by a complement with de ("of"), which specifies what’s being divided:

    La mitad de mis ahorros son para mi viaje por Sudamérica.

    Half of my savings are for my trip around South America.

    Quiero este tercio del pastel.

    I want this third of the cake.

    Dos quintos de los estudiantes faltaron a clase.

    Two-fifths of the students missed the class.

    Fractions used as adjectives

    When used as adjectives, they are used in the feminine form, since they’re usually followed by the noun parte ("part"):

    La cuarta parte de los estudiantes aprobó el examen final.

    The fourth part of the students passed the final exam.

    Important

    Only the word medio ("half") can modify directly the noun that expresses what is being divided, with which it has to agree in gender and number:

    Me comí media galfeminineleta.
    I ate half a cookie.
    Lleva medio pastmasculineel a tu casa.
    Take half a cake to your house.

    Notice how there is no indefinite article un ("a") after “medio/a.”

    Here’s a useful table with fractions in Spanish:

    number
    noun
    adjective

    1/2

    mitad

    half

    medio, media

    half

    1/3

    tercio

    one third

    tercera (parte)

    third

    1/4

    cuarto

    one fourth

    cuarta (parte)

    fourth

    1/5

    quinto

    one fifth

    quinta (parte)

    fifth

    1/6

    sexto

    one sixth

    sexta (parte)

    sixth

    1/7

    séptimo

    one seventh

    séptima (parte)

    seventh

    1/8

    octavo

    one eight

    octava (parte)

    eighth

    1/9

    noveno

    one ninth

    novena (parte)

    ninth

    1/10

    décimo, décima

    one tenth

    décima (parte)

    tenth

    1/11

    onceavo, undécimo

    one eleventh

    onceava, undécima (parte)

    eleventh

    1/12

    doceavo, duodécimo

    one twelfth

    doceava, duodécima (parte)

    twelfth

    1/13

    treceavo

    one thirteenth

    treceava (parte)

    thirteenth

    1/14*

    catorceavo

    one fourteenth

    catorceava (parte)

    fourteenth

    1/20

    veinteavo, vigésimo

    one twentieth

    veinteava, vigésima (parte)

    twentieth

    1/30

    treintavo, trigésimo

    one thirtieth

    treintava, trigésima (parte)

    thirtieth

    1/100

    centésimo, centésima

    one hundredth

    centésima (parte)

    hundredth

    1/1000

    milésimo, milésima

    one thousandth

    milésima (parte)

    thousandth

    1/10000

    diezmilésimo, diezmilésima

    one ten thousandth

    diezmilésima (parte)

    thousandth

    1/100000

    cienmilésimo, cienmilésima

    one hundred thousandth

    cienmilésima (parte)

    hundred thousandth

    1/1000000

    millonésimo, millonésima

    one millionth

    millonésima (parte)

    millionth

    *From here onwards, you can make the fractions by adding the suffix -avo for nouns and -ava for adjectives.

    Important

    Only the fractions corresponding to ten, one hundred, one thousand, and one million, and their multiples, can be masculine or feminine when used as nouns.

    What are multiplicatives?

    Multiplicatives express the result of multiplying a quantity by a natural number. For example, when we say: doble ("double"), triple ("triple"), cuádruple ("quadruple"), etc. They can also be used as nouns or adjectives in Spanish.

    Multiplicatives used as nouns

    In this case, they’re always masculine; they’re usually used after an article and they mean “a quantity X times bigger”:

    En la conferencia de hoy tuvimos el doble de asistencia.

    In the conference today we had double the attendance.

    Multiplicatives used as adjectives

    They describe the noun they’re referring to, with which they must agree in number:

    Hay una función doble en el cine.

    There’s a double feature in the movies.

    Necesito dos camas dobles para los niños.

    I need two double beds for the kids.

    Here’s a useful table with multiplicatives in Spanish:

    number
    multiplicative

    2

    doble
    double

    3

    triple
    triple

    4

    cuádruple
    quadruple

    5

    quíntuple
    quintuple

    6

    séxtuple
    sextuple

    7

    séptuple
    sevenfold

    8

    óctuple
    octuple

    9

    nónuplo
    ninefold

    10

    décuplo
    tenfold

    11

    undécuplo
    eleven fold

    12

    duodécuplo
    twelve fold

    13

    terciodécuplo
    thirteen fold

    100

    céntuplo
    hundred fold
    Important

    The most common multiplicatives are doble, triple, and cuádruple. From nine onwards, they’re rare. In such cases, you can use the cardinal number and the phrase “veces mayor” ("times larger") or “veces más” ("times more"):

    Los ingresos aumentaron diez veces más este año.

    The income increased ten times more this year.

    Bonus track: Collective numerals

    As a small present for you, let me add a few collective numerals. These are numbers that mean that several persons or objects are grouped together.

    Pay attention to their endings: the ones ending in -a are feminine, as in, una decena ("ten"), and the ones ending in -r are masculine, as in, un par ("a couple").

    Some common collective numerals in Spanish are:

    • un par ("a couple, a pair")
    • una decena ("ten")
    • una docena ("a dozen")
    • una quincena ("fifteen")
    • una veintena ("twenty")
    • una treintena ("thirty")
    • un centenar / una centena ("one hundred")
    • un millar ("one thousand")

    Let’s see an example:

    ¿Cuántas personas fueron al concierto? - Un millar.

    How many people went to the concert? - One thousand.

    All these collective numerals can be pluralized in Spanish when we use cardinal numbers beyond one:

    Deme tres docenas de tortilla.

    Give me three dozen tortillas.

    Important

    When a noun follows a collective numeral, you need to join them with the preposition de ("of"):

    Solo un par de estudiantes entregó la tarea.

    Only a pair of students handed in the homework.

    In conclusion

    Numbers are used all the time, but with ordinals, fractions, multiplicatives, and collective numerals, the lower numbers are used a lot more frequently than the higher ones. Also, remember that fractions and multiplicatives can be used as nouns or adjectives. So, when used as nouns, don’t forget the article in front and, when used as adjectives, don’t forget to do the agreement with the noun they modify. That’s it on numbers! Don’t forget to check out our activities to continue practicing your Spanish skills!

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