240﹣240÷15×4=236 .
= : =140%=35÷ = .
A除以B的商是1.8,A是B的 %.
把小数化成分数,把分数化成小数. 0.05= = = 0. .
=0.75=6: = %= 折.
将45%化成小数后应为 .