Subtract 15/12 from 20/54
1st number: 20/54, 2nd number: 1 3/12
20/54 - 15/12 is -95/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 12 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 54 × 2 = 108,
20/54 = 20 × 2/54 × 2 = 40/108 - Likewise, for the 2nd fraction, since 12 × 9 = 108,
15/12 = 15 × 9/12 × 9 = 135/108 - Subtract the two like fractions:
40/108 - 135/108 = 40 - 135/108 = -95/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/54-15/12 20/54-30/12 20/54-15/24 60/54-15/12 20/54-45/12 20/54-15/36 20/54-75/12 20/54-15/60 20/54-15/84