B- 1/2 the books are science books. You have to add the two fractions and subtract that from one.
1. you have to figure out what 3/4 of Ella's time is.

(You find that out by multiplying 5x1. Then add 3.)
2. Convert the fractions into decimals. (This will help make it easier when dividing.)


3. Next you are going to divide 1.6 by .75

4. Now multiple 2.13 by 5.

Answer is 10
The answer is 5663588 for your question
First you subtract 25 from 5 which equals 20 then you multipliy 4 to 20 and you get 80...so 80 is your solution.