Question

4. Which of the following pairs represent the same rational number?
a. -7/21 and 3/9
b. -3/5 and -12/20
c. -5/-9 and 5/-9
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Answer 1

Answer:

The answer is

a. -7/21 and 3/9

b. -3/5 and -12/20

Since

$\frac{ - 7}{ \: 21} = \frac{ - 1}{3}$

And

$\frac{ - 3}{5} = \: \frac{ - 12}{20}$

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