Subtract 81/80 from 18/49
1st number: 18/49, 2nd number: 1 1/80
18/49 - 81/80 is -2529/3920.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 49 × 80 = 3920,
18/49 = 18 × 80/49 × 80 = 1440/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
81/80 = 81 × 49/80 × 49 = 3969/3920 - Subtract the two like fractions:
1440/3920 - 3969/3920 = 1440 - 3969/3920 = -2529/3920
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