Subtract 45/24 from 28/20
1st number: 1 8/20, 2nd number: 1 21/24
28/20 - 45/24 is -19/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
28/20 = 28 × 6/20 × 6 = 168/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
45/24 = 45 × 5/24 × 5 = 225/120 - Subtract the two like fractions:
168/120 - 225/120 = 168 - 225/120 = -57/120 - After reducing the fraction, the answer is -19/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-45/24 28/20-90/24 28/40-45/24 28/20-45/48 84/20-45/24 28/60-45/24 28/20-45/72