Subtract 30/9 from 28/15
1st number: 1 13/15, 2nd number: 3 3/9
28/15 - 30/9 is -22/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
28/15 = 28 × 3/15 × 3 = 84/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
30/9 = 30 × 5/9 × 5 = 150/45 - Subtract the two like fractions:
84/45 - 150/45 = 84 - 150/45 = -66/45 - After reducing the fraction, the answer is -22/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15-30/9 28/15-60/9 28/30-30/9 28/15-30/18 84/15-30/9 28/15-90/9 28/45-30/9 28/15-30/27 28/75-30/9 28/15-30/45 28/15-30/63