Subtract 20/4 from 20/12
1st number: 1 8/12, 2nd number: 5 0/4
20/12 - 20/4 is -10/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
20/12 = 20 × 1/12 × 1 = 20/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
20/4 = 20 × 3/4 × 3 = 60/12 - Subtract the two like fractions:
20/12 - 60/12 = 20 - 60/12 = -40/12 - After reducing the fraction, the answer is -10/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12-20/4 20/12-40/4 20/24-20/4 20/12-20/8 60/12-20/4 20/12-60/4 20/36-20/4 20/12-20/12 20/60-20/4 20/84-20/4 20/12-20/28