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