Question

1/15 =x/2,25

(1+1/2) ÷ 1/2=4/2x

12/=(0,81) 1/2 / 0,666

Answer 1

1/15 = X/2,25
MULTIPLICA EM CRUZ
15.X = 1 . 2,25
15.X= 2,25
X = 2,25/15
X = 0,15

(1 + 1/2 ) : 1/2 = 4/2 X
m.m.c = 2
(2/2 + 1/2 ) : 1/2 = 4/2 x
3/2 : 1/2 = 4/2 x
3/2 . 2/1 = 4/2 x
6/2 = 4/2 x
multiplica em cruz
6.2 x = 2 . 4
12 x = 8
x = 8/12 simplifica por 4 = 2/3