Subtract 20/5 from 18/15
1st number: 1 3/15, 2nd number: 4 0/5
18/15 - 20/5 is -14/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 5 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 15 × 1 = 15,
18/15 = 18 × 1/15 × 1 = 18/15 - Likewise, for the 2nd fraction, since 5 × 3 = 15,
20/5 = 20 × 3/5 × 3 = 60/15 - Subtract the two like fractions:
18/15 - 60/15 = 18 - 60/15 = -42/15 - After reducing the fraction, the answer is -14/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-20/5 18/15-40/5 18/30-20/5 18/15-20/10 54/15-20/5 18/15-60/5 18/45-20/5 18/15-20/15 90/15-20/5 18/75-20/5 18/15-20/25 18/15-20/35