Increasing and Decreasing

Example 1

Katie earns £40 per week for her part-time job. She is to be given a 5% pay rise. 
How much will she earn per week after the pay rise?

5% of £40 = 5 100 × £40 = £2 New pay : £40 + £2 = £42

Example 2

The prices of all the televisions in a shop are to be increased by 8%. 
Calculate the new price of a television that originally cost £150.

8% of £150 = 8 100 × £150 = £12 New price : £150 + £12 = £162

Example 3

In a sale the cost of a computer is reduced by 30%. The normal price of the computer was £900. 
Calculate the sale price of…