Subtract 15/18 from 28/60
28/60 - 15/18 is -11/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
28/60 = 28 × 3/60 × 3 = 84/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
15/18 = 15 × 10/18 × 10 = 150/180 - Subtract the two like fractions:
84/180 - 150/180 = 84 - 150/180 = -66/180 - After reducing the fraction, the answer is -11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/60-15/18 28/60-30/18 28/60-15/36 84/60-15/18 28/60-45/18 28/60-15/54 28/60-75/18 28/60-15/90