In mathematics, a number representing a part of a whole, such as 1/2 or 3/4 (a fraction).
この分数を最も簡単な形に約分してください。
Please reduce this fraction to its simplest form.
3分の1は分数で1/3と表す。
One third is written as the fraction 1/3.
分数の足し算では分母をそろえる必要がある。
When adding fractions, you need to make the denominators the same.