Question

Photo above. please help!

Answer 1

This is a proportion. You need to be able to find the missing value based on the information they've provided you with. 

Here's the best way to solve ⇒

2/3 = x/48
Cross multiply them.  ⇔   2*48 = 3x
96 = 3x
x = 32

the missing value is 32

Answer 2

Cross multiplication!
Because it is a proportion
$\frac{2}{3}$ = $\frac{?}{48}$
2 × 48 = 3 × ?
96 = 3 × ?
Divide by 3 on both sides to isolate the unknown number
$\frac{96}{3}$ = $\frac{3 * ?}{3}$
3 and 3 cancels out

32 = ?
The unknown number is 32