10% of 45 is 4.5
.1 x 45
When doing 10% of something, move the decimal to the left once.
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40% of 45 is 18, which is 10% of 180.
4.5 is 45% of 10
10% off of £45= 10% discount applied to £45= £45 - (10% x £45)= £45 - (0.10 x £45)= £45 - £4.50= £40.50
The actual tax is 10/100 * 45 = .1 * 45 = 4.5 The price with tax is 45 + 4.5 = 49.5
Well, darling, 80% of 45 is 36. You just move that decimal point one place to the left to find 10%, then multiply by 8 to get your answer. So, there you have it, 36 is 80% of 45. Math can be a breeze when you know the tricks!