Question

Ms. Allen filled a glass jar with marbles. students guessed the number of marbles in the jar. Jen guessed there were 127 marbles in the jar the jar contained 132 marbles to the nearest tenth of a percent what is the percentage of error for jens guess

Answer 1

We need to find a percent error.

First find the difference between the exact value and the estimate

132 -127 = 5

Now divide by the exact value

5/132 =.0378787878.....

We then need to change it to a percent by multiplying by 100

3.78787878 %

Round to the nearest tenth, which is the first decimal place.

We look at the first number after the decimal and round up since the next number is an 8

3.8 % error

The final answer is 3.8% error