Subtract 28/27 from 42/24
1st number: 1 18/24, 2nd number: 1 1/27
42/24 - 28/27 is 77/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 24 × 9 = 216,
42/24 = 42 × 9/24 × 9 = 378/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
28/27 = 28 × 8/27 × 8 = 224/216 - Subtract the two like fractions:
378/216 - 224/216 = 378 - 224/216 = 154/216 - After reducing the fraction, the answer is 77/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/24-28/27 42/24-56/27 42/48-28/27 42/24-28/54 42/24-84/27 42/72-28/27 42/24-28/81