Subtract 21/30 from 56/75
56/75 - 21/30 is 7/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
56/75 = 56 × 2/75 × 2 = 112/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
21/30 = 21 × 5/30 × 5 = 105/150 - Subtract the two like fractions:
112/150 - 105/150 = 112 - 105/150 = 7/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/75-42/30 56/75-21/60 56/75-63/30 56/75-21/90