Question

check whether the following rational numbers are equivalent or not 3/-7 and -9/21​

Answer 1

Answer:

Yes

Step-by-step explanation:

Because

3/-7 means we can also write as -3/7

Then,

-3/7= -3×3/7×3

-3/7 = -9/21

When we simplify -9/21 by dividing with 3

We can get-3/7

So these are equivalent rational numbers.

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Answer 2

Answer:

Yes, they are congruent

Step-by-step explanation:

If we write both of the fractions in the standard form

$\frac{3}{-7}$ and $\frac{-9}{21}$

we will get,

-$\frac{3}{7}$ and -$\frac{9}{21}$

if we multiply 3 in the numerator and denominator of the first fraction we get,

-$\frac{3}{7}$ × $\frac{3}{3}$ = -$\frac{9}{21}$

Therefore, both of the fractions are equivalent

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