Subtract 63/7 from 81/80
1st number: 1 1/80, 2nd number: 9 0/7
81/80 - 63/7 is -639/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
81/80 = 81 × 7/80 × 7 = 567/560 - Likewise, for the 2nd fraction, since 7 × 80 = 560,
63/7 = 63 × 80/7 × 80 = 5040/560 - Subtract the two like fractions:
567/560 - 5040/560 = 567 - 5040/560 = -4473/560 - After reducing the fraction, the answer is -639/80
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