-4/5 times -20
= (- 4/5) × (- 20)
So since, 20 = 20/1
(- 4/5) × (- 20)
= (- 4/5) x (- 20/1)
= (- 4 × - 20) / (5 × 1)
And since a negative multiplied by a negative equals a positive:
(- 4 × - 20) / (5 × 1)
= (4 × 20) / (5 × 1)
= 80 / 5
This fraction can then be simplified as 80 and 5 both have a common factor (common factor = number that they both can be divided by).
Their common factor is 5.
So:
80 / 5
= (16 × 5) / (1 × 5)
Now we can cancel out the 5's . So the fraction becomes:
(16 × 5) / (1 × 5)
= 16/1
= 16
So -4/5 times -20 equals 16 .