what is 142.5% of 20

100% of 20 = 20

10% of 20 = 2

40% of 20 = 4*10% of 20 = 4*2 = 8

2.5% of 20 = 1/4 * 10% of 20 = 1/4 * 2 = 0.5

Add up the numbers in bold to get 142.5% of 20 = 20+8+0.5 = 28.5

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Turn the percent into a decimal by moving the decimal point over two points to the left. 142.5% in decimal form is 1.425. Then multiply 20 by 1.425. The answer is 28.5.

28.5 is 142.5% of 20

Now for a third good answer

142.5% of 20

% means out of 100  it even has a one and 2 zero!   and of means  multiply so if I convert this to maths speak I get

142.5/100*20      

what is 142.5% of 20?          20 is 100%

(20/100)*142.5= 28.5

No Civonamzuk,

As soon as you multiply by 100 you must REMOVE the percent sign :)

If you did that then your answer would be right but your working would still not make much sense. 

At the present time your answer is correct but it does not correspond to the working you have shown!