Question

The product of two rational numbers is -3/7, If one number is 5/21 . Then the other number is:​

Answer 1

Step-by-step explanation:

the product of two rational numbers is -3/7

one of the number is 5/21

let the other number be 'x'

x×5/21 = -3/7

x = -3/7÷5/21

x = -3/7×21/5

x = -3×3/5

x = -9/5

so the other number is -9/5

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Answer 2

Answer:

$\boxed{\tt \red{x = \frac{-12}{5}}}$

Step-by-step explanation:

Let the other number be $x$

So,

$\frac{5}{21} X x = \frac{-4}{7} \\\\x = \frac{-4}{7} X \frac{21}{5} \\\\x = \frac{-12}{5}$

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