Subtract 36/8 from 28/20
1st number: 1 8/20, 2nd number: 4 4/8
28/20 - 36/8 is -31/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 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 8 × 5 = 40,
36/8 = 36 × 5/8 × 5 = 180/40 - Subtract the two like fractions:
56/40 - 180/40 = 56 - 180/40 = -124/40 - After reducing the fraction, the answer is -31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-36/8 28/20-72/8 28/40-36/8 28/20-36/16 84/20-36/8 28/60-36/8 28/20-36/24 28/20-36/40 28/20-36/56