Amy paid 72.34 for a pair of running shoes during a 20%off sale. what was the regular price?

0.8 P = 72.34

P = 72.34 / 0.8

To find the regular price of the running shoes, we can use the concept of percentage discounts.

First, let's determine what the sale price of the shoes is after a 20% discount. We know that Amy paid $72.34 for the shoes, and this amount is equal to 80% of the regular price (since 20% has been deducted).

Let's represent the regular price as "x". We can set up the following equation:

0.8x = $72.34

To find the value of "x", we divide both sides of the equation by 0.8:

x = $72.34 / 0.8

Calculating this, we find:

x = $90.425

Therefore, the regular price of the running shoes was $90.425.