Subtract 8/81 from 28/16
1st number: 1 12/16, 2nd number: 8/81
28/16 - 8/81 is 535/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 81 is 1296
Next, find the equivalent fraction of both fractional numbers with denominator 1296 - For the 1st fraction, since 16 × 81 = 1296,
28/16 = 28 × 81/16 × 81 = 2268/1296 - Likewise, for the 2nd fraction, since 81 × 16 = 1296,
8/81 = 8 × 16/81 × 16 = 128/1296 - Subtract the two like fractions:
2268/1296 - 128/1296 = 2268 - 128/1296 = 2140/1296 - After reducing the fraction, the answer is 535/324
- In mixed form: 1211/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/16-8/81 28/16-16/81 28/32-8/81 84/16-8/81 28/16-24/81 28/48-8/81 28/16-40/81 28/80-8/81 28/16-56/81