Ralph read one-eighth of his book what fraction of the book does he have left

Question

I CANT SOLVE MY NIECES HOMEWORK!!

Answer 1

1 - 1/8 = 7/8 left for Ralph to read

use a more concrete example to visualize it better

assume the book has 800 pages

Ralph read 1/8 x 800 = 100 pages

he has 800-100 = 700 to go

700/800 = 7/8 left to read

Answer 2

The number 1 represents the entire book. Since Ralph has read 1/8 of his book, what is left to read is:

1 - (1/8). In order to do the subtraction the number 1 needs to be represented as a fraction with the same denominator as 1/8. That would be 8/8.

So the operation to perform is 8/8 - 1/8 = 7/8, i.e. to add or subtract fractions having a common denominator, add or subtract the numerators keeping the denominator the same.

Picture a block of wood divided into 8 cubes of equal size. Each block is 1/8 of the whole. Take away one of the blocks and you have 7 blocks left over.