Subtract 8/6 from 72/21
1st number: 3 9/21, 2nd number: 1 2/6
72/21 - 8/6 is 44/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
72/21 = 72 × 2/21 × 2 = 144/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
8/6 = 8 × 7/6 × 7 = 56/42 - Subtract the two like fractions:
144/42 - 56/42 = 144 - 56/42 = 88/42 - After reducing the fraction, the answer is 44/21
- In mixed form: 22/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21-16/6 72/42-8/6 72/21-8/12 72/21-24/6 72/63-8/6 72/21-8/18 72/21-40/6 72/21-8/30 72/21-56/6 72/21-8/42