What is the product in lowest terms?

-8/9 x 5/6

a: -1
b: -13/15
c: -20/27
d: -1/5

When multiply fractions, multiply the numerators together and denominators together.

-8 x 5 = -40
9 x 6 = 54

-8/9 x 5/6 = -40/54

To simplify the fraction, find the biggest number that both 40 and 54 can go into. To do this, list the factors of each.

40-
1,2,4,5,8,10,20,40

54-
1,2,3,6,9,18,27,54

The biggest number each goes into is 2

Divide both -40 and 54 by 2

-40/2=-20
54/2=27

-40/54 = -20/27

C is he correct answer