Subtract 8/21 from 72/5
1st number: 14 2/5, 2nd number: 8/21
72/5 - 8/21 is 1472/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
72/5 = 72 × 21/5 × 21 = 1512/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
8/21 = 8 × 5/21 × 5 = 40/105 - Subtract the two like fractions:
1512/105 - 40/105 = 1512 - 40/105 = 1472/105 - In mixed form: 142/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/5-16/21 72/10-8/21 72/5-8/42 72/5-24/21 72/15-8/21 72/5-8/63 72/5-40/21 72/25-8/21 72/5-56/21 72/35-8/21