Resposta :
regra de tres
240 ----------- 100%
90 ----------- x
240x = 90 . 100
240x = 9000
x = 9000/ 240
x = 37,5 %
240 ----------- 100%
90 ----------- x
240x = 90 . 100
240x = 9000
x = 9000/ 240
x = 37,5 %