Subtract 56/10 from 21/72
1st number: 21/72, 2nd number: 5 6/10
21/72 - 56/10 is -637/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
56/10 = 56 × 36/10 × 36 = 2016/360 - Subtract the two like fractions:
105/360 - 2016/360 = 105 - 2016/360 = -1911/360 - After reducing the fraction, the answer is -637/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/72-56/10 21/72-56/20 63/72-56/10 21/72-56/30 21/72-56/50 21/72-56/70