Write the mixed number as an improper fraction.

-4 1/5

-4 1/5 = - 21/5

since to make it an improper fraction you first have to multiply the whole number to the denominator then u add the product to the numerator, the denominator stays the same.

So it's:

-4*5 = - 20

-20 + - 1 = - 21

-21/5

- (4 1/5)

5 (4) + 1 = 21

Thus the answer would be - 21/5