Subtract 4/81 from 28/8
1st number: 3 4/8, 2nd number: 4/81
28/8 - 4/81 is 559/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
28/8 = 28 × 81/8 × 81 = 2268/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
4/81 = 4 × 8/81 × 8 = 32/648 - Subtract the two like fractions:
2268/648 - 32/648 = 2268 - 32/648 = 2236/648 - After reducing the fraction, the answer is 559/162
- In mixed form: 373/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/8-4/81 28/8-8/81 28/16-4/81 84/8-4/81 28/8-12/81 28/24-4/81 28/8-20/81 28/40-4/81 28/8-28/81 28/56-4/81