Martha estimated there were 85 marbles in a jar for a contest. the actual number of marbles in the jar was 107. what was the percent error of martha's estimation?

21%.  

Step-by-step explanation:

We have been given that Martha estimated there were 85 marbles in a jar for a contest. The actual number of marbles in the jar was 107.

We will use percentage error formula to answer our problem.

Let us substitute our given values in above formula.  

Therefore, the percent error of Martha's estimation is 21% to the nearest percent.

where's the diagrams?

it should be a and d. lmk if i'm wrong xd