Question

How do you know 72/80 is greater than 7/8? Explain.

Answer 1

Because 7/8 is the same as 70/80 and 72 is greater than 70 so yeah.

Answer 2

Question: How do you know $\frac{72}{80} \ \textgreater \ \frac{7}{8} ?$

To know for sure why its larger, you need to make sure they have the same denominator (bottom number)

To do that, multiply both sides in $\frac{7}{8}$ by 10 which is $\frac{70}{80}$

$72\ \textgreater \ 70$

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-Geekhawk