You don't need common denominators to know that 5/7 is greater than 5/8.
5 pieces that are 1/8 of something will be smaller than 5 pieces that are 1/7 of that thing.
If you were to use common denominators, the denominator you might choose would be 7*8 = 56.
5/7 = 40/56
5/8 = 35/56
5/7 is larger.
5 pieces that are 1/8 of something will be smaller than 5 pieces that are 1/7 of that thing.
If you were to use common denominators, the denominator you might choose would be 7*8 = 56.
5/7 = 40/56
5/8 = 35/56
5/7 is larger.
