We are learning to find percentages of 3 digit numbers.

What does % mean? per cent for every 100

To find 1% of a number ÷ by 100 Find 1% of ÷ 100 (move all digits 2 places to the right) % of 225 =. 225

To find 10% of a number ÷ by 10 Find 10% of ÷ 10 (move all digits 1 place to the right) % of 376 =.376

Can we use this information To find 11% of a number? 10% + 1% = 11%

Find 11% of ÷ 100 = ÷ 10 =

Find 2% of 453 1% of ÷ 100 =4.53 1% x 2 = 2% 4.53 x x 3 = 6 2 x 5 = 10 (carry the 1) 2 x 4 = = 9 The decimal point goes between the 9 and the 0. There are 2 digits after the decimal point in the sum so we need 2 digits after the decimal point in the answer. 2% of 453 =

Use these methods to find 12% of 563 Hint: add together 10%, 1% and 1% = 16% of 285 Hint: add together 10%, 6 x 1% (6 x 2.85) =

Can you find 20% of 621? Hint: 20% = 10% + 10% or 10% x ÷ 10 = x % of 621 = 124.2