Subtract 56/63 from 70/80
70/80 - 56/63 is -1/72.
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,
70/80 = 70 × 63/80 × 63 = 4410/5040 - Likewise, for the 2nd fraction, since 63 × 80 = 5040,
56/63 = 56 × 80/63 × 80 = 4480/5040 - Subtract the two like fractions:
4410/5040 - 4480/5040 = 4410 - 4480/5040 = -70/5040 - After reducing the fraction, the answer is -1/72
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