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if 20% is equal to 81, how i find what 100% equals

 Mar 25, 2020
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Name your desired number as x. If 20% of x is equal to 81, we can write:

\(0.20x = 81\)(do you see how I got here?)

The way you reach this expression is because 20% is equivalent to 20 * 1/100, which is just 20/100, which is equivalent to 0.20

Then, we realize that if we multiply this by 5, we just get:

\(x= 405\)

That gives us our desired answer.

 Mar 25, 2020

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