Question

1 1/9:(0.8y)=1/7:3.6

Answer 1

35

Explanation:

Answer 2

3.5

Explanation:

Solve for y:

`(1)/(9):(0.8y)=(1)/(7):3.6`

First rewrite it as proportion:

`((1)/(9))/(0.8y)=((1)/(7))/(3.6)`

Cross multiply:

`(1)/(9)\cdot 3.6=(1)/(7)\cdot 0.8y\\ \\0.4=(0.8y)/(7)`

Multiply it by 70:

`28=8y\\ \\y=(28)/(8)=(7)/(2)=3.5`