noun, noun or participle which takes 'suru', transitive verb
reduction of a fraction; simplifying a fraction
Dated mathematical term for reducing a fraction to its lowest terms. Modern Japanese more commonly uses 約分 (やくぶん).
See also: 約分
分数を通約して簡単にする。
Reduce the fraction to its simplest form.
In this problem, you first need to simplify the fraction.