Subtract 28/20 from 40/4
1st number: 10 0/4, 2nd number: 1 8/20
40/4 - 28/20 is 43/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
40/4 = 40 × 5/4 × 5 = 200/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
28/20 = 28 × 1/20 × 1 = 28/20 - Subtract the two like fractions:
200/20 - 28/20 = 200 - 28/20 = 172/20 - After reducing the fraction, the answer is 43/5
- In mixed form: 83/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4-28/20 40/4-56/20 40/8-28/20 40/4-28/40 40/4-84/20 40/12-28/20 40/4-28/60 40/20-28/20 40/28-28/20