Subtract 50/30 from 28/20
1st number: 1 8/20, 2nd number: 1 20/30
28/20 - 50/30 is -4/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
50/30 = 50 × 2/30 × 2 = 100/60 - Subtract the two like fractions:
84/60 - 100/60 = 84 - 100/60 = -16/60 - After reducing the fraction, the answer is -4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-50/30 28/40-50/30 28/20-50/60 84/20-50/30 28/60-50/30 28/20-50/90