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AnnZ [28]
3 years ago
15

What is 1/5 of 75? And how do you get that answer?

Mathematics
1 answer:
Elina [12.6K]3 years ago
7 0
Change the fraction to a percentage first. It'll be easier.

1/5 is equal to 20%.
"What is 20% of 75?" is now the question.

Now, we set up the problem.

\frac{part}{whole} = \frac{percent}{100}

The part will be 'x', since it is unknown, and 75 is the whole. 20% (1/5) will be the percent, obviously.

Here's a tip: If you can't find what the whole is, it usually follows 'of'.

Fill in the blanks.
\frac{x}{75} = \frac{20}{100}\\\\cross\ multiply\\\\75\times20=1500\\100\times x=100x \\\\1500=100x\\x=15


15 is 1/5 of 75.
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