To add or subtract fractions, they need to have the same denominator.
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Practice makes perfect
When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators.
3/4 - 7/8Since 8 is a multiple of 4, we can multiply both the numerator and denominator of 34 by 2 to create a common denominator.
