Subtract 20/8 from 20/12
1st number: 1 8/12, 2nd number: 2 4/8
20/12 - 20/8 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
20/12 = 20 × 2/12 × 2 = 40/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
20/8 = 20 × 3/8 × 3 = 60/24 - Subtract the two like fractions:
40/24 - 60/24 = 40 - 60/24 = -20/24 - After reducing the fraction, the answer is -5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12-20/8 20/12-40/8 20/24-20/8 20/12-20/16 60/12-20/8 20/12-60/8 20/36-20/8 20/12-20/24 20/60-20/8 20/12-20/40 20/84-20/8 20/12-20/56