Subtract 28/80 from 28/5
1st number: 5 3/5, 2nd number: 28/80
28/5 - 28/80 is 21/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
28/5 = 28 × 16/5 × 16 = 448/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
28/80 = 28 × 1/80 × 1 = 28/80 - Subtract the two like fractions:
448/80 - 28/80 = 448 - 28/80 = 420/80 - After reducing the fraction, the answer is 21/4
- In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/5-28/80 28/5-56/80 28/10-28/80 84/5-28/80 28/5-84/80 28/15-28/80 28/25-28/80 28/35-28/80