Subtract 20/40 from 28/20
1st number: 1 8/20, 2nd number: 20/40
28/20 - 20/40 is 9/10.
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,
20/40 = 20 × 1/40 × 1 = 20/40 - Subtract the two like fractions:
56/40 - 20/40 = 56 - 20/40 = 36/40 - After reducing the fraction, the answer is 9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-20/40 28/40-20/40 28/20-20/80 84/20-20/40 28/20-60/40 28/60-20/40