# Calculating a Percentage Change

#### What's Included

• Smart Notebooks Presentation
• Interactive Excel File
• Activ Inspire Flipchart
• Lesson Plan
• Microsoft PowerPoint Presentation
• Differentiated Worksheet

# Calculating a Percentage Change

Students learn about calculating a percentage change using a decimal multiplier.  Learning progresses from finding a simple percentage increase to solving financial maths problems with interest and depreciation.

The start of the lesson recaps how to find a percentage of an amount without a calculator.  The plenary challenges students to compare three deals each of which involves a proportion change.

##### Differentiated Learning Objectives
• All students should be able to calculate a percentage increase using a multiplier.
• Most students should be able to calculate a percentage increase and decrease using a multiplier.
• Some students should be able to calculate a repeated percentage increase and decrease using a multiplier.
Calculations with Percentages

### Mr Mathematics Blog

#### Surface Area of Cylinders

When I teach how to find the surface area of cylinders I like to add a constant level of challenge and enjoyment to the lesson.  Rather than repetitively calculating the surface area of a cylinder I introduce more complex cylindrical shapes. How to find the Surface Area of Cylinders To find the surface area of […]

#### Teaching Mathematics for a Growth Mindset

Inspiring students to enjoy maths and feel the success that comes with attempting a difficult challenge is why I teach.  The feeling of success is addictive.  The more students experience it the more they want it and the further out of their comfort zone they are willing to go to get more of it.  Teaching […]

#### Equation of Straight Line Graphs

To find the equation of straight line graphs students need to calculate the gradient using two pairs of coordinates and the intercept which is the y value of where it crosses the vertical axis.  Examiner’s reports of past exam questions show students are more able to find the intercept of a straight line than they […]