I always think of it in terms of money. If you have a dollar, 15 cents is 15%.
To find 15% the easiest way to do it is to find 10% and then add another 1/2 to it.
For example:
$42.50 10% is $4.25 (just move the decimal) then you add 1/2 of $4.25 or $2.12 to the original $4.25 to get 15%.
If you are finding 20% simply double the 10%. Super easy for finding tips :-)
HTH
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Multiply it by 0.15, or divide by 100 and multiply by 15.
Or you find 10% of the number, then half the answer :)
To find 15% of any number, multiply the number by 0.15
To get 30 percent of something, multiply that something to 0.30 which is the decimal equivalent of 30%. Example: 30% of 49 = 0.30 * 49 = 14.7
39.47%% rate:= 15/38 * 100%= 0.3947 * 100%= 39.47%
Divide it by 20 or multiply it by 0.05
15 percent percent of 450 = 0.675.