Subtract 81/4 from 70/63
1st number: 1 7/63, 2nd number: 20 1/4
70/63 - 81/4 is -689/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 4 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
70/63 = 70 × 4/63 × 4 = 280/252 - Likewise, for the 2nd fraction, since 4 × 63 = 252,
81/4 = 81 × 63/4 × 63 = 5103/252 - Subtract the two like fractions:
280/252 - 5103/252 = 280 - 5103/252 = -4823/252 - After reducing the fraction, the answer is -689/36
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