Subtract 10/21 from 9/56
9/56 - 10/21 is -53/168.
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,
9/56 = 9 × 3/56 × 3 = 27/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
10/21 = 10 × 8/21 × 8 = 80/168 - Subtract the two like fractions:
27/168 - 80/168 = 27 - 80/168 = -53/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/56-10/21 9/56-20/21 9/56-10/42 27/56-10/21 9/56-30/21 9/56-10/63 45/56-10/21 9/56-50/21 63/56-10/21 9/56-70/21