Subtract 72/10 from 50/21
1st number: 2 8/21, 2nd number: 7 2/10
50/21 - 72/10 is -506/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
50/21 = 50 × 10/21 × 10 = 500/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
72/10 = 72 × 21/10 × 21 = 1512/210 - Subtract the two like fractions:
500/210 - 1512/210 = 500 - 1512/210 = -1012/210 - After reducing the fraction, the answer is -506/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-72/10 50/21-72/20 50/63-72/10 50/21-72/30 50/21-72/50 50/21-72/70