Subtract 10/42 from 72/12
1st number: 6 0/12, 2nd number: 10/42
72/12 - 10/42 is 121/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 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 42 × 2 = 84,
10/42 = 10 × 2/42 × 2 = 20/84 - Subtract the two like fractions:
504/84 - 20/84 = 504 - 20/84 = 484/84 - After reducing the fraction, the answer is 121/21
- In mixed form: 516/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12-20/42 72/24-10/42 72/12-10/84 72/12-30/42 72/36-10/42 72/12-50/42 72/60-10/42 72/12-70/42 72/84-10/42