Subtract 90/98 from 81/80
1st number: 1 1/80, 2nd number: 90/98
81/80 - 90/98 is 369/3920.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 98 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 80 × 49 = 3920,
81/80 = 81 × 49/80 × 49 = 3969/3920 - Likewise, for the 2nd fraction, since 98 × 40 = 3920,
90/98 = 90 × 40/98 × 40 = 3600/3920 - Subtract the two like fractions:
3969/3920 - 3600/3920 = 3969 - 3600/3920 = 369/3920
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