Subtract 2/81 from 8/4
1st number: 2 0/4, 2nd number: 2/81
8/4 - 2/81 is 160/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
8/4 = 8 × 81/4 × 81 = 648/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
2/81 = 2 × 4/81 × 4 = 8/324 - Subtract the two like fractions:
648/324 - 8/324 = 648 - 8/324 = 640/324 - After reducing the fraction, the answer is 160/81
- In mixed form: 179/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/4-2/81 8/4-4/81 24/4-2/81 8/4-6/81 8/12-2/81 40/4-2/81 8/4-10/81 8/20-2/81 56/4-2/81 8/4-14/81 8/28-2/81