Daniel guesses that he scored a 95 on his science test.His actual score is 91. What is the percent error in Daniel's guess? Round to the nearest tenth of a percent.

1) Formula for the percent of error:

                               [estimated measure - real measure]
Percent of error = ---------------------------------------------------- x 100
                                            real measure

2) Calculations:

                             [95 - 91]
Percent error =  --------------- x 100 = 4.4 %
                                 91

Answer: 4.4%