Question 722562: how much is 20% amount of 5670
Answer by KMST(5328)   (Show Source):
You can put this solution on YOUR website! If you know what words mean, you do not need to memorize too much in math.
20% means 20 out of every hundred.
In  you have  hundreds, so 20% of that is
(That's the way I would calculate it if I had to do it in my head of with just paper and pencil).
You could look at the problem and do the calculation in different ways.
In general, to calculate percentages, we multiply the original amount times the percentage as a fraction, or ratio, or decimal:
20% = 
If your calculator has a percent key you can enter that calculation as 1134 times 20% using the percent key or as 1134 times 0.2, or as 1134 times 0.20.
You get the same answer
You could calculate it as  of by dividing by  too.
Very often percentages can be calculated in your head.
It is very useful when you try to figure out interest, or price reductions, or tips, or sales tax.
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