Subtract 28/5 from 45/30
1st number: 1 15/30, 2nd number: 5 3/5
45/30 - 28/5 is -41/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 5 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
45/30 = 45 × 1/30 × 1 = 45/30 - Likewise, for the 2nd fraction, since 5 × 6 = 30,
28/5 = 28 × 6/5 × 6 = 168/30 - Subtract the two like fractions:
45/30 - 168/30 = 45 - 168/30 = -123/30 - After reducing the fraction, the answer is -41/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-28/5 45/30-56/5 45/60-28/5 45/30-28/10 45/30-84/5 45/90-28/5 45/30-28/15 45/30-28/25 45/30-28/35