Question

Express `4/7` as a rational number with numerator: −20

Answer 1

Given the current numerator is 4, and we want the numerator to become −20, the scaling factor is:

Scaling factor = `(-20)/4 = -5`

Multiply both the numerator and denominator of `4/7`​ by −5:

`4/7 = (4xx(-5))/(7xx(-5)) = (-20)/-35`

The negative signs in both numerator and denominator cancel out:

`(-20)/-35 = (-20)/35`

`=(-20)/35`