Subtract 20/7 from 63/81
1st number: 63/81, 2nd number: 2 6/7
63/81 - 20/7 is -131/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
63/81 = 63 × 7/81 × 7 = 441/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
20/7 = 20 × 81/7 × 81 = 1620/567 - Subtract the two like fractions:
441/567 - 1620/567 = 441 - 1620/567 = -1179/567 - After reducing the fraction, the answer is -131/63
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