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Calculating Percentage: Lesson 1

Grades K-8 Worksheets

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Multiplying and Dividing Numbers by Power of 10 Worksheets



Note: The mini-lesson above has audio. It gives a brief introduction to the concept of percent and illustrates the importance of the number 100 in all percentage calculations. It is the first in a series of three mini-lessons. Select from the options below to view the other two mini-lessons on calculating with percent.

extract from lesson 1 - Introduction

Lesson #1

 


Related Resources

The Percentages Lesson explained above is aligned with the standard 6RP03 from the Common Core Standards For Mathematics (see the shortened extract below). The resources below are also aligned to this standard.

Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.

  • Make tables of equivalent ratios relating quantities with whole-number measurements, find missing values in the tables, and plot the pairs of values on the coordinate plane. Use tables to compare ratios.
  • Solve unit rate problems including those involving unit pricing and constant speed. For example, if it took 7 hours to mow 4 lawns, then at that rate, how many lawns could be mowed in 35 hours? At what rate were lawns being mowed?
  • Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole, given a part and the percent.
  • Use ratio reasoning to convert measurement units; manipulate and transform units appropriately when multiplying or dividing quantities.

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    Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:

    Understand ratio concepts and use ratio reasoning to solve problems