Subtract 4/80 from 28/20
1st number: 1 8/20, 2nd number: 4/80
28/20 - 4/80 is 27/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
28/20 = 28 × 4/20 × 4 = 112/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
4/80 = 4 × 1/80 × 1 = 4/80 - Subtract the two like fractions:
112/80 - 4/80 = 112 - 4/80 = 108/80 - After reducing the fraction, the answer is 27/20
- In mixed form: 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-4/80 28/20-8/80 28/40-4/80 84/20-4/80 28/20-12/80 28/60-4/80 28/20-20/80 28/20-28/80