Subtract 9/4 from 20/15
1st number: 1 5/15, 2nd number: 2 1/4
20/15 - 9/4 is -11/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
20/15 = 20 × 4/15 × 4 = 80/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
9/4 = 9 × 15/4 × 15 = 135/60 - Subtract the two like fractions:
80/60 - 135/60 = 80 - 135/60 = -55/60 - After reducing the fraction, the answer is -11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-9/4 20/15-18/4 20/30-9/4 20/15-9/8 60/15-9/4 20/15-27/4 20/45-9/4 20/15-9/12 20/15-45/4 20/75-9/4 20/15-9/20 20/15-63/4 20/15-9/28