Subtract 70/63 from 81/80
1st number: 1 1/80, 2nd number: 1 7/63
81/80 - 70/63 is -71/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 63 is 5040
Next, find the equivalent fraction of both fractional numbers with denominator 5040 - For the 1st fraction, since 80 × 63 = 5040,
81/80 = 81 × 63/80 × 63 = 5103/5040 - Likewise, for the 2nd fraction, since 63 × 80 = 5040,
70/63 = 70 × 80/63 × 80 = 5600/5040 - Subtract the two like fractions:
5103/5040 - 5600/5040 = 5103 - 5600/5040 = -497/5040 - After reducing the fraction, the answer is -71/720
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