Finding Percents Mentally Math Worksheet

Mental math strategies for finding 10%, 50%, 25% and multiples of 10% of a number, with a fill-in-the-blank rule for each strategy followed by practice problems such as 20% of 70.
Grades
Grades 7–10
File type
PDF
Preparation
Print ready

Updated Oct 19, 2026

Subject
Math
Topic
Percents, Equations
Resource types
Worksheets
Preparation
Print ready

From the author

About this resource

Here is a Finding Percents Mentally Math Worksheet that can be utilized as homework, an assessment and so much more.

It is a 2-page worksheet with a variety of problems to solve.

Answer key included.

In the classroom

Teaching tips & learning objectives

Learning objectives

  • Find 10% of a number and use it to find multiples of 10%

  • Find 50% and 25% of a number mentally

  • Break a percent such as 15% into a sum of easier percents

Skills covered

  • Stating percent strategies — students complete fill-in-the-blank rules before applying them

  • Mental percent calculation — students solve problems such as 10% of 300 and 25% of 40 without a calculator

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