Subtract 42/18 from 28/27
1st number: 1 1/27, 2nd number: 2 6/18
28/27 - 42/18 is -35/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 18 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 27 × 2 = 54,
28/27 = 28 × 2/27 × 2 = 56/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
42/18 = 42 × 3/18 × 3 = 126/54 - Subtract the two like fractions:
56/54 - 126/54 = 56 - 126/54 = -70/54 - After reducing the fraction, the answer is -35/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/27-42/18 28/27-84/18 28/54-42/18 28/27-42/36 84/27-42/18 28/81-42/18 28/27-42/54 28/27-42/90