Subtract 4/20 from 9/12
9/12 - 4/20 is 11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
9/12 = 9 × 5/12 × 5 = 45/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
4/20 = 4 × 3/20 × 3 = 12/60 - Subtract the two like fractions:
45/60 - 12/60 = 45 - 12/60 = 33/60 - After reducing the fraction, the answer is 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12-4/20 9/12-8/20 9/24-4/20 9/12-4/40 27/12-4/20 9/12-12/20 9/36-4/20 9/12-4/60 45/12-4/20 9/60-4/20 63/12-4/20 9/12-28/20 9/84-4/20