Predict:68 points
Actual:49 points
Error:68-49=19 points, so
The percent error is:
19÷68≈0.28 or 28%. As a result, the percent error is 28%.
Also, there is another way to do it, here it is:
49÷68≈0.72 or 72%
Lastly, the percent error is
100%-72%=28%. Hope it help!