Starter Questions

1. Find the area and perimter of a square with length 8 cm.

2. Calculate 60% of £300

3. Write 35% as a fraction in its simplest form

Learning IntentionLearning Intention

To understand how to calculate a percentage using a

calculator.

Percentages(Calculator)

By converting a percentage to fraction form, we can work out a percentage of an amount using a

calculator.Suppose we want to work out 38% of £65.

38% =

So we key in:

And get an answer of 24.7.

We write the answer as £24.70.

Percentages(using a calculator)

38

100=38 ÷ 100

3 88 ÷ 1 0 0 × 6 5 =Remember money is 2

decimal places

By initially writing a percentage as a decimal, we can work out a percentage using a calculator.

Suppose we want to work out 57% of £80.

57% =0.57

So we key in:

0 . 5 7 × 8 0 =

And get an answer of 45.6.

We write the answer as £45.60.

Percentages(using a calculator)

Remember money is 2

decimal places

Percentages(using a calculator)

Example You have to pay 8% of tax on fuel bills.Calculate 8% of the following amounts

a) £250 b) £360 c) £190 d) £550

Now try Ex 2.2Ch2 Pg 14

Percentages