Evaluate the expression 8 16/21 + 8 11/14 - 9 1/7

8 17/42.

Step-by-step explanation:

WE convert each fraction 's denominator to the LCD (lowest common denominator. LCD of 7 14 and 21 = 42.

So we have 8 32/42 + 8 33/42 - 9 6/42

8 + 8 - 9 = 7.

32/42 + 33/42 - 6/42

= 59/42 = 1 17/42.

7 + 1 17/42

= 8 17/42.