How many fifths are there in four wholes?

Monday, August 6, 2012

To determine the number of 1/5 there are in 4, divide the 4 by 1/5.

$\displaystyle{4}\div\frac{{1}}{{5}}$

To divide them, express the 4 as a fraction.

$\displaystyle=\frac{{4}}{{1}}\div\frac{{1}}{{5}}$

To divide two fractions, flip the second fraction and change the operation from division to multiplication.

$\displaystyle=\frac{{4}}{{1}}\times\frac{{5}}{{1}}$

$\displaystyle=\frac{{20}}{{1}}$

$\displaystyle={20}$

Therefore, there are 20 fifths in four wholes.

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