Subtract 21/72 from 8/7
1st number: 1 1/7, 2nd number: 21/72
8/7 - 21/72 is 143/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 7 × 72 = 504,
8/7 = 8 × 72/7 × 72 = 576/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Subtract the two like fractions:
576/504 - 147/504 = 576 - 147/504 = 429/504 - After reducing the fraction, the answer is 143/168
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