Answer
(a) 100% of a number is equal to the number itself.
(b) 100% of 10 is 10.
Work Step by Step
This shortcut works because when you convert 100% into a decimal it is equal to 1.0 and any number multiplied by 1 is itself.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.