Subtract 70/54 from 81/12
1st number: 6 9/12, 2nd number: 1 16/54
81/12 - 70/54 is 589/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 54 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 12 × 9 = 108,
81/12 = 81 × 9/12 × 9 = 729/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
70/54 = 70 × 2/54 × 2 = 140/108 - Subtract the two like fractions:
729/108 - 140/108 = 729 - 140/108 = 589/108 - In mixed form: 549/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/24-70/54 81/36-70/54 81/60-70/54 81/84-70/54