Carl has three lengths of cable. 5/6 yard long, 1/4 yard long, and 2/3 yard long. he needs at least 1 yard of cable. after carl has used 1 yard of cable, how much cable will he have left? explain how you found your answer.

So this wants you to add the fractions and subtract 1/1

we know that 6/8=3/4 because 3/4 times 2/2 (or 1) os 6/8

so we need the denomenators (bottom number) to be the same

so 5/6=10/12
1/4=3/12
2/3=8/12
add them together
10+3+8=21
21/12=1 and 9/12
subtract 1 and get
9/12 left or 3/4 yard left

The shelves will hold 270 books in total