Subtract 49/27 from 81/80
1st number: 1 1/80, 2nd number: 1 22/27
81/80 - 49/27 is -1733/2160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 27 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 80 × 27 = 2160,
81/80 = 81 × 27/80 × 27 = 2187/2160 - Likewise, for the 2nd fraction, since 27 × 80 = 2160,
49/27 = 49 × 80/27 × 80 = 3920/2160 - Subtract the two like fractions:
2187/2160 - 3920/2160 = 2187 - 3920/2160 = -1733/2160
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/80-98/27 81/80-49/54 81/80-49/81