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Published byRyan Rogers Modified over 4 years ago

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We are learning to find percentages of 3 digit numbers.

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What does % mean? per cent for every 100

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

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

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

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Find 11% of 352 352 ÷ 100 = 352. 3. 5 2 352 ÷ 10 = 3.52 352. 3. 5 2 35.2 3.52 35.2 + 27. 83

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Find 2% of 453 1% of 453 453 ÷ 100 =4.53 1% x 2 = 2% 4.53 x 2 60 1 9 2 x 3 = 6 2 x 5 = 10 (carry the 1) 2 x 4 = 8 + 1 = 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 =

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Use these methods to find 12% of 563 Hint: add together 10%, 1% and 1% 56.3 + 5.63 + 5.63 = 16% of 285 Hint: add together 10%, 6 x 1% 28.5 + (6 x 2.85) =

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Can you find 20% of 621? Hint: 20% = 10% + 10% or 10% x 2 621 ÷ 10 = 62.1 + x 2 124.2 20% of 621 = 124.2

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