Martha estimated there were 89 marbles in a jar for a contest. The actual number of marbles in the jar was 111. What was the percent error of Martha's estimation?

18.91 percent

Step-by-step explanation:

Percent error equation: Difference or Difference/Actual

Actual

The difference is the greater amount minus the smaller.

111 - 89 = 22

The actual is 111.

Now divide 22/111.

22/111 = 0.189 repeating

0.189 repeating = about 18.91 percent