Subtract 6/81 from 81/5
1st number: 16 1/5, 2nd number: 6/81
81/5 - 6/81 is 2177/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
81/5 = 81 × 81/5 × 81 = 6561/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
6/81 = 6 × 5/81 × 5 = 30/405 - Subtract the two like fractions:
6561/405 - 30/405 = 6561 - 30/405 = 6531/405 - After reducing the fraction, the answer is 2177/135
- In mixed form: 1617/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5-12/81 81/10-6/81 81/5-18/81 81/15-6/81 81/5-30/81 81/25-6/81 81/5-42/81 81/35-6/81