How do you write -4 1/5 as an improper fraction

-21/5

Multiply 4 and 5, add 1

To turn a -4 1/5 you need to: 

1. Multiply -4 and 5
-4 x 5 = -20 

2. Add -20 and 1. 
-20 + 1 = -19

The improper fraction is -19/5

The steps to turn any mixed fraction to an improper fraction is: 
1. Multiply the whole number by the denominator.
2. Add the product to the numerator.
3. Put the sum on top of the original denominator.