Subtract 45/20 from 5/15
1st number: 5/15, 2nd number: 2 5/20
5/15 - 45/20 is -23/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
5/15 = 5 × 4/15 × 4 = 20/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Subtract the two like fractions:
20/60 - 135/60 = 20 - 135/60 = -115/60 - After reducing the fraction, the answer is -23/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15-45/20 5/15-90/20 5/30-45/20 5/15-45/40 5/45-45/20 5/15-45/60 25/15-45/20 5/75-45/20 35/15-45/20