Question

-3 by -5 ,12by -20 compare the numbers​

Answer 1

-3 by -5 = $\frac{(-3)}{(-5)}$ = $\frac{3}{5}$

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

Comparing the numerators:

On comparing the numerators, we get,

3 > -3

∴ $\frac{3}{5}$ = -3 by -5 is greater.

Cross-multiplying:

On cross-multiplying the numerators and the denominators, we get,

3 × 5 = 15

(-3) × 5 = -15

Clearly, 15 > -15

∴ -3 by -5 is greater than 12 by -20.