Subtract 90/7 from 21/24
1st number: 21/24, 2nd number: 12 6/7
21/24 - 90/7 is -671/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 7 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Likewise, for the 2nd fraction, since 7 × 24 = 168,
90/7 = 90 × 24/7 × 24 = 2160/168 - Subtract the two like fractions:
147/168 - 2160/168 = 147 - 2160/168 = -2013/168 - After reducing the fraction, the answer is -671/56
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