Question

se vitoria acertou 10 questoes de 15 quantos % ela ficara?

Answer 1

15 - 100%
10 - x
15x = 1000
x = 1000/15
x = 66,67%

Answer 2

15 -------------100%
10--------------   x
x . 15 = 10 . 100
x = 1000/15
x = 66,66%