Subtract 81/80 from 20/75
1st number: 20/75, 2nd number: 1 1/80
20/75 - 81/80 is -179/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 80 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 75 × 16 = 1200,
20/75 = 20 × 16/75 × 16 = 320/1200 - Likewise, for the 2nd fraction, since 80 × 15 = 1200,
81/80 = 81 × 15/80 × 15 = 1215/1200 - Subtract the two like fractions:
320/1200 - 1215/1200 = 320 - 1215/1200 = -895/1200 - After reducing the fraction, the answer is -179/240
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