G8.10.2 Using a multiplier

Chapter 8.
Percentages

Cambridge Lower Secondary Coursebook 8.

10.2 Using a multiplier

Learning Objective:

After the end of this section you will be able to

• use a multiplier to calculate a percentage increase or decrease.

Getting Started

Compare two methods

Draw

Enter numbers to use a multiplier to increase 45 by 20%.

Multiple Choice

A value is multiplied by 0.27.

What is the percentage change?

• An increase of 27%

• A decrease of 27%

• An increase of 73%

• A decrease of 73%

Multiple Choice

A value is multiplied by 1.09.

What is the percentage change?

• An increase of 90%

• A decrease of 9%

• An increase of 9%

• A decrease of 90%

Draw

During the first three months, most babies will grow by 12.5%.

The length of a baby at birth is 50 cm.

Complete the calculation to use a multiplier to find the approximate length of the baby when it is three months old.

Open Ended

Reflection and Self-assessment

https://bit.ly/G8-Tulip