Subtract 28/40 from 28/20
1st number: 1 8/20, 2nd number: 28/40
28/20 - 28/40 is 7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
28/20 = 28 × 2/20 × 2 = 56/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
28/40 = 28 × 1/40 × 1 = 28/40 - Subtract the two like fractions:
56/40 - 28/40 = 56 - 28/40 = 28/40 - After reducing the fraction, the answer is 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-28/40 28/20-56/40 28/40-28/40 28/20-28/80 84/20-28/40 28/20-84/40 28/60-28/40