Subtract 15/81 from 8/4
1st number: 2 0/4, 2nd number: 15/81
8/4 - 15/81 is 49/27.
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,
15/81 = 15 × 4/81 × 4 = 60/324 - Subtract the two like fractions:
648/324 - 60/324 = 648 - 60/324 = 588/324 - After reducing the fraction, the answer is 49/27
- In mixed form: 122/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/4-15/81 8/4-30/81 24/4-15/81 8/4-45/81 8/12-15/81 40/4-15/81 8/4-75/81 8/20-15/81 56/4-15/81 8/28-15/81