Subtract 3/21 from 72/6
1st number: 12 0/6, 2nd number: 3/21
72/6 - 3/21 is 83/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
72/6 = 72 × 7/6 × 7 = 504/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Subtract the two like fractions:
504/42 - 6/42 = 504 - 6/42 = 498/42 - After reducing the fraction, the answer is 83/7
- In mixed form: 116/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/6-6/21 72/12-3/21 72/6-3/42 72/6-9/21 72/18-3/21 72/6-3/63 72/6-15/21 72/30-3/21 72/42-3/21