Subtract 20/12 from 25/27
1st number: 25/27, 2nd number: 1 8/12
25/27 - 20/12 is -20/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 12 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 27 × 4 = 108,
25/27 = 25 × 4/27 × 4 = 100/108 - Likewise, for the 2nd fraction, since 12 × 9 = 108,
20/12 = 20 × 9/12 × 9 = 180/108 - Subtract the two like fractions:
100/108 - 180/108 = 100 - 180/108 = -80/108 - After reducing the fraction, the answer is -20/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/27-20/12 25/27-40/12 25/54-20/12 25/27-20/24 75/27-20/12 25/27-60/12 25/81-20/12 25/27-20/36 25/27-20/60 25/27-20/84