Subtract 60/21 from 15/56
1st number: 15/56, 2nd number: 2 18/21
15/56 - 60/21 is -145/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
15/56 = 15 × 3/56 × 3 = 45/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
60/21 = 60 × 8/21 × 8 = 480/168 - Subtract the two like fractions:
45/168 - 480/168 = 45 - 480/168 = -435/168 - After reducing the fraction, the answer is -145/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/56-60/21 15/56-60/42 45/56-60/21 15/56-60/63 75/56-60/21