Subtract 10/21 from 72/12
1st number: 6 0/12, 2nd number: 10/21
72/12 - 10/21 is 116/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
72/12 = 72 × 7/12 × 7 = 504/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
10/21 = 10 × 4/21 × 4 = 40/84 - Subtract the two like fractions:
504/84 - 40/84 = 504 - 40/84 = 464/84 - After reducing the fraction, the answer is 116/21
- In mixed form: 511/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12-20/21 72/24-10/21 72/12-10/42 72/12-30/21 72/36-10/21 72/12-10/63 72/12-50/21 72/60-10/21 72/12-70/21 72/84-10/21