Subtract 30/9 from 81/54
1st number: 1 27/54, 2nd number: 3 3/9
81/54 - 30/9 is -11/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 9 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
81/54 = 81 × 1/54 × 1 = 81/54 - Likewise, for the 2nd fraction, since 9 × 6 = 54,
30/9 = 30 × 6/9 × 6 = 180/54 - Subtract the two like fractions:
81/54 - 180/54 = 81 - 180/54 = -99/54 - After reducing the fraction, the answer is -11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/54-60/9 81/54-30/18 81/54-90/9 81/54-30/27 81/54-30/45 81/54-30/63