Subtract 28/5 from 81/16
1st number: 5 1/16, 2nd number: 5 3/5
81/16 - 28/5 is -43/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 5 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
81/16 = 81 × 5/16 × 5 = 405/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
28/5 = 28 × 16/5 × 16 = 448/80 - Subtract the two like fractions:
405/80 - 448/80 = 405 - 448/80 = -43/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/16-56/5 81/32-28/5 81/16-28/10 81/16-84/5 81/48-28/5 81/16-28/15 81/80-28/5 81/16-28/25 81/16-28/35