Question

(80pts) The ratio of the number of A's in the class to B's in the class was 2:5. How many people got A's if there were 40 people who got B's?

Answer 1

Make a proportion using the ratio (A:B) given and number of As and Bs really gotten in the class ($\frac{A's}{B's}$)

$\frac{2}{5} = \frac{A}{40}$

Cross multiply

2 * 40 = 5 * A

80 = 5A

Isolate A by dividing 5 to both sides

80/5 = 5A/5

16 = A

If 40 people in the class got B's then 16 people got A's

Hope this helped!

~Just a girl in love with Shawn Mendes