Question

quando calculamos 3% de 120 obtemos

Answer 1

100% --- 120
   3% --- x

Multiplica cruzado:

100.x = 120.3
100x = 360
x = 360 / 100
x = 3,6

:))

Answer 2

Calcular 3% de 120 =
3/100 . 120 = 3/10 . 12 = 36/10 = 3,6