Subtract 21/8 from 84/7
1st number: 12 0/7, 2nd number: 2 5/8
84/7 - 21/8 is 75/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
84/7 = 84 × 8/7 × 8 = 672/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
21/8 = 21 × 7/8 × 7 = 147/56 - Subtract the two like fractions:
672/56 - 147/56 = 672 - 147/56 = 525/56 - After reducing the fraction, the answer is 75/8
- In mixed form: 93/8
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