Shea's mother wanted to get him a doctor's bag for a graduation present. she thought it would cost $125, but the actual cost was $95.99. what is the percent error between her estimate and the actual cost

100% = 95.99

What about 1%? We need to form an equation

100 = 95.99

1 = x

Cross multiplying this equation we get

100 * x = 95.99 * 1

100 x = 95.99

x = 95.99/100

x = 0.96

Now then,

1% = 0.96 dollars

x % = 125 dollars

Cross multiplying, we get:

0.96x = 125

so

x = 125 / 0.96

x = 130. 2 %

130.2% - 100% = 30.2 %

Therefore her percentage error is 30.2 % above the actual cost.