Subtract 42/27 from 45/28
1st number: 1 17/28, 2nd number: 1 15/27
45/28 - 42/27 is 13/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
45/28 = 45 × 27/28 × 27 = 1215/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
42/27 = 42 × 28/27 × 28 = 1176/756 - Subtract the two like fractions:
1215/756 - 1176/756 = 1215 - 1176/756 = 39/756 - After reducing the fraction, the answer is 13/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28-42/27 45/28-84/27 45/56-42/27 45/28-42/54 45/84-42/27 45/28-42/81