Subtract 8/81 from 18/4
1st number: 4 2/4, 2nd number: 8/81
18/4 - 8/81 is 713/162.
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,
18/4 = 18 × 81/4 × 81 = 1458/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
8/81 = 8 × 4/81 × 4 = 32/324 - Subtract the two like fractions:
1458/324 - 32/324 = 1458 - 32/324 = 1426/324 - After reducing the fraction, the answer is 713/162
- In mixed form: 465/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4-8/81 18/4-16/81 18/8-8/81 54/4-8/81 18/4-24/81 18/12-8/81 90/4-8/81 18/4-40/81 18/20-8/81 18/4-56/81 18/28-8/81