Last month Bill's electric bill was $80.77. This month it is $69.06. what is the percent decrease?

$80.77 - $69.06 = $11.71 , I don't understand multiply decimal by 100 to get the decrease

You only did the first part.

You forgot to divide 11.71 by 80.77

100 (11.71 / 80.77) = ?

Whats the answer

To calculate the percent decrease, you need to find the difference between the initial and final values and express it as a percentage of the initial value. Here's how you can do it step by step:

1. Find the difference:
The initial value of Bill's electric bill was $80.77 and the final value is $69.06. To find the difference, subtract the final value from the initial value:
$80.77 - $69.06 = $11.71

2. Calculate the percentage decrease:
To express the decrease as a percentage of the initial value, divide the difference by the initial value and multiply by 100:
($11.71 / $80.77) * 100 ≈ 14.5%

So, the percent decrease in Bill's electric bill is approximately 14.5%.