Hi!
Let's check your answer by doing the opposite.
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The way to find the area of a rectangle is multiplying the width by height. So you need to multiply
[tex]3\frac{1}{8} * 6\frac{2}{5} = ?[/tex].
The opposite of multiplying those, is dividing them.
[tex]? / 3\frac{1}{8} = 6\frac{2}{5}[/tex]
Now since you're saying the answer is 20, put in the value.
[tex]20 / 3\frac{1}{8} = 6\frac{2}{5}[/tex]
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Convert the mixed numbers to improper fractions by multiplying the whole number by the denominator then adding it to the numerator. The denominator stays the same.
3 * 8 + 1 = 25
6 * 5 + 2 = 32
[tex]20 / \frac{25}{8} = \frac{32}{5}[/tex]
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Now solve.
[tex]\frac{160}{25} = \frac{32}{5}[/tex]
Simplify
[tex]\frac{32}{5} = \frac{32}{5}[/tex]
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Your answer is correct!
Hope this helps! :)
-Peredhel
