Subtract 15/20 from 28/30
28/30 - 15/20 is 11/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
28/30 = 28 × 2/30 × 2 = 56/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
15/20 = 15 × 3/20 × 3 = 45/60 - Subtract the two like fractions:
56/60 - 45/60 = 56 - 45/60 = 11/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-15/20 28/30-30/20 28/60-15/20 28/30-15/40 84/30-15/20 28/30-45/20 28/90-15/20 28/30-15/60 28/30-75/20