Subtract 18/7 from 81/80
1st number: 1 1/80, 2nd number: 2 4/7
81/80 - 18/7 is -873/560.
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,
18/7 = 18 × 80/7 × 80 = 1440/560 - Subtract the two like fractions:
567/560 - 1440/560 = 567 - 1440/560 = -873/560
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