**How to calculate percentage of an amount?**

Use the percentage formula:** **

Method One

Tom saw a bike for £150 with an additional 10% discount off how much did he get of the original price?

Convert the problem to the equation using the **percentage **formula: **P% * X = Y ÷ 100 (**percentage times X equal Y÷ 100)

P = 10% and X = 150

so the equation is 10% x 150 = 1500 ÷ 100= 15

Therefore Y =15

therefore Tom got £15 off the original price

Solution:

Y= is 10% of 150

*Equation: Y = P% * X*

Y = 10% * 150 =1500

Converting percent to decimal:

Y = 1500 ÷ 100 = 15

Y = 15

Use the percentage formula: