The balance in Victor's savings account went from $80 to $120. By what percentage

did the money in his savings account increase?

50%

Step-by-step explanation:

To find the percent increase, divide the increase by the original value.

The increase is $40.

The original value is $80.

40:80 = 0.5

0.5 ⇒ 50%

It is a 50% increase.