Subtract 30/81 from 28/16
1st number: 1 12/16, 2nd number: 30/81
28/16 - 30/81 is 149/108.
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,
30/81 = 30 × 16/81 × 16 = 480/1296 - Subtract the two like fractions:
2268/1296 - 480/1296 = 2268 - 480/1296 = 1788/1296 - After reducing the fraction, the answer is 149/108
- In mixed form: 141/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/16-30/81 28/16-60/81 28/32-30/81 84/16-30/81 28/16-90/81 28/48-30/81 28/80-30/81