Subtract 30/28 from 72/12
1st number: 6 0/12, 2nd number: 1 2/28
72/12 - 30/28 is 69/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 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 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Subtract the two like fractions:
504/84 - 90/84 = 504 - 90/84 = 414/84 - After reducing the fraction, the answer is 69/14
- In mixed form: 413/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12-60/28 72/24-30/28 72/12-30/56 72/12-90/28 72/36-30/28 72/12-30/84 72/60-30/28 72/84-30/28