Ahospital bill is estimated to be $462.00. it ends up actually costing the patient $525.00. what is the percent error in the bill?

In order to find the percent error, we need to first find the difference between what was expected and what is actually costed. We do this by subtracting:



So now we know that the expected amount was off by $63. To find the percent error, we need to take this $63, and divide it by the amount that was estimated. Let's do that now:



However this is in decimal form. We need to multiply by 100 in order to get it in a percent:



Now we know that the percent error of the hospital bill estimate is 13.64%.