Question

qual a taxa percentual que 2 representa de 10

Answer 1

regra de 3
2------10
x------100
multiplica cruzado
10 x = 2 . 100
10 x = 200
x = 200/10
x = 20 %                ok

Answer 2

regrinha de 3
10 ----- 100%
 2  ----- x% 

multiplica cruzado
10x= 200
x= 200/10
x= 20%

resposta: a taxa percentual do 2 seria de 20%