Subtract 18/10 from 28/27
1st number: 1 1/27, 2nd number: 1 8/10
28/27 - 18/10 is -103/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
28/27 = 28 × 10/27 × 10 = 280/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
18/10 = 18 × 27/10 × 27 = 486/270 - Subtract the two like fractions:
280/270 - 486/270 = 280 - 486/270 = -206/270 - After reducing the fraction, the answer is -103/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/27-18/10 28/27-36/10 28/54-18/10 28/27-18/20 84/27-18/10 28/27-54/10 28/81-18/10 28/27-18/30 28/27-90/10 28/27-18/50 28/27-18/70