THAT THE SCIENTISTS TRIED TO FIND 11 BUT IT WAS ONLY A BASE 10 SYSTEM :) : )) :)
<u>Explanation</u>
Find the Least Common Multiple of the denominators (which is called the Least Common Denominator).
Change each fraction (using equivalent fractions) to make their denominators the same as the least common denominator.
Then add (or subtract) the fractions, as we wish!
<u>Credit to mathisfun.com!</u>
40% because 24 nonfiction books divided by 60 books in total equals 0.4 which is equal to 40%
The answer is 21 groups.
7/1 ÷ 1/3 flip the signs on 1/3
now just multiply across...
7/1 × 3/1
21/1
21