Question

Explain how you could estimate 22% of 78 to check if your answer is reasonable.

The question has to do with an estimate not the true answer.

Answer 1

To estimate 22% of 78, you can round 78 to 80 and calculate 10% of 80, which is 8. Then, you can estimate 22% by adding 8 + 8 + 2, which is 18. This means that your answer should be somewhere around 18. If your answer is significantly different from 18, then you may have made a mistake in your calculations.