Japanese Lesson 19 – Reading of number (2) [Decimal, Fraction, Percentage]

Reading of decimal and fraction in Japanese is easy.
Reading of percentage is not so difficult, too.
Let’s learn them.


In Japan, period is used as decimal point.
The reading in Japanese is “ten” meaning “dot” in English.

Each of numerical figures after a decimal point is read as a number.
0 is read as either zero or rei.

When integer part is 0, it is usually read as “rei”.
And, when the numerical figure of one’s place of the integer part is 2 (ni) or 5 (go), it is usually read long like “nii” or “goo”.

3.14 = san ten ichi yon
0.705 = rei ten nana rei go
255.6 = nihyaku gojuu goo ten roku


Reading of fraction in Japanese is also easy.

(Denominator) bun no (Numerator)

Note that you must read denominator first in reverse order of notation.

English has the words such as “half” (1/2) and “quarter” (1/4).
In Japanese, there is only word “hanbun” equivalent to “half”.


Expression of percentage

When we express rate, we use percentage.
The name of the unit is “percent”, and is called as “paasento” in Japanese sound.
Of course, it is OK to add it after the number.

When the number is a multiple of 10, the end part of the Japanese word is “juu”.
At that time, “juu” and “paasento” combine and they become “juppaasento”.

In addition, “wari” is often used as the expression for percent of a multiple of 10.
The unit is peculiar to Japan, and it is convenient to express rough rate.


Adverbs to express round numbers

When you want to express in round numbers, some adverbs are put before or after the number.


Above words are often used.
It is OK to use one word or as a combination of both words.

yaku 4,000 (yon-sen)
oyoso 4,000
daitai 4,000
4,000 gurai
4,000 hodo
oyoso 4,000 hodo
daitai 4,000 gurai

Unit words for the range of number


There are a few words to express the range of number.
“Ijoo” and “ika” include own number.
“Miman” doesn’t include own number.
But there isn’t the word expressing the larger range not including own number.

60 ijoo = 60 or over
60 ika = 60 or under
60 miman = under 60

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