How to Find the Percent of a Number Mentally


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question 1 of 3

What is 25% of 120?

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1. What is 10% of 49.5?

2. What is 99% of 300?

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About This Quiz & Worksheet

There are times in life when being able to mentally find the percent of a number will come in handy, like when you are trying to figure out how much to tip at a restaurant. The questions in this assessment will see how well you can find the percent of whole numbers and decimals in your head.

Quiz & Worksheet Goals

This interactive quiz will check your abilities in the following:

  • Using mental division to help find a percent
  • Knowing what 50% means
  • Moving a decimal point to find the percentage of a number

Skills Practiced

This quiz and worksheet will help you gauge your competency with the following skills:

  • Problem solving - use acquired knowledge about finding 10% and 1% to help solve mental math problems
  • Reading comprehension - ensure that you draw the most important information from the related lesson about finding the percent of a number without using a pencil and paper, smartphone app, or calculator
  • Information recall - access the knowledge you've gained regarding what 50% means and an easy way to find it

Additional Learning

For more information about these topics, check out the lesson connected with this quiz called How to Find the Percent of a Number Mentally. You'll explore:

  • Percents
  • Moving decimal points
  • Tips for figuring percentages
  • Real life applications of mentally determining the percent of a number