adverb
Adverbial use expressing a moderate degree; often interchangeable with 比較的 or かなり.
今日は割り方暖かいですね。
It's rather warm today, isn't it?
この映画は割り方面白かった。
This movie was quite interesting.
noun
rate; ratio; percentage; proportion
Noun use referring to a comparative measure or share; less common than the adverbial sense.
利益の割り方を決める。
Decide the proportion of profits.
割り方で計算すると、一人あたり千円になる。
Calculated by ratio, it comes to 1,000 yen per person.
Compound of 割り (wari, 'division') + 方 (kata, 'way, method'), literally 'way of dividing'. The adverbial sense developed from the idea of 'in a divided manner' → 'proportionally' → 'comparatively'.