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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, Middle School, High School
File type
PDF
Preparation
Print ready

Updated Oct 19, 2026

Subject
Math, Percentages
Topic
percents, equations
Resource types
Worksheets & Printables, Worksheets
Preparation
Print ready

About this resource

What's inside 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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