Subtract 28/9 from 45/30
1st number: 1 15/30, 2nd number: 3 1/9
45/30 - 28/9 is -29/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
45/30 = 45 × 3/30 × 3 = 135/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
28/9 = 28 × 10/9 × 10 = 280/90 - Subtract the two like fractions:
135/90 - 280/90 = 135 - 280/90 = -145/90 - After reducing the fraction, the answer is -29/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-28/9 45/30-56/9 45/60-28/9 45/30-28/18 45/30-84/9 45/90-28/9 45/30-28/27 45/30-28/45 45/30-28/63