6 is 80% of what number?

# 6 is 80% of what number?

1. A
6.5
2. B
7
3. C
7.5
4. D
8

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### Solution:

Let x be the unknown,what number in the above equation.The word of represent a multiplication and in represent =
hence , the above question may be translated that into a math equation as follow
6=80%$×x$
Solve  of $x$ obtain $x$=%
Rewrite the percentage  80% as a fraction in the above equation $x$=$\frac{6}{80/100}$
To divide 6 by the fraction $\frac{80}{100}$ multiply by the reciprocal of the $\frac{80}{100}$ Hence  $x$=6[$\frac{80}{100}$]=$\frac{600}{80}$ =7.5

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