Subtract 50/45 from 20/28
1st number: 20/28, 2nd number: 1 5/45
20/28 - 50/45 is -25/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
20/28 = 20 × 45/28 × 45 = 900/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
50/45 = 50 × 28/45 × 28 = 1400/1260 - Subtract the two like fractions:
900/1260 - 1400/1260 = 900 - 1400/1260 = -500/1260 - After reducing the fraction, the answer is -25/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28-50/45 20/56-50/45 20/28-50/90 60/28-50/45 20/84-50/45