Subtract 50/15 from 18/20
1st number: 18/20, 2nd number: 3 5/15
18/20 - 50/15 is -73/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
50/15 = 50 × 4/15 × 4 = 200/60 - Subtract the two like fractions:
54/60 - 200/60 = 54 - 200/60 = -146/60 - After reducing the fraction, the answer is -73/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-50/15 18/40-50/15 18/20-50/30 54/20-50/15 18/60-50/15 18/20-50/45 90/20-50/15 18/20-50/75