Question

Subtract 7/8−1/12. don't know

Answer 1

You can use calculator.
If not allowed, 7/8x(12/12) - 1/12x(8/8)

Answer 2

See below.

Explanation:

Find the Lowest Common Multiple, or LCM of 8 and 12.

8 - 8, 16, 24

12 - 12, 24

7 x 3 = 21

8 x 3 = 24

1 x 2 = 2

12 x 2 = 24

21/24 - 2/24 = 19/24

-hope it helps