Subtract 6/81 from 4/5
4/5 - 6/81 is 98/135.
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,
4/5 = 4 × 81/5 × 81 = 324/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
6/81 = 6 × 5/81 × 5 = 30/405 - Subtract the two like fractions:
324/405 - 30/405 = 324 - 30/405 = 294/405 - After reducing the fraction, the answer is 98/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/5-6/81 4/5-12/81 4/10-6/81 12/5-6/81 4/5-18/81 4/15-6/81 20/5-6/81 4/5-30/81 4/25-6/81 28/5-6/81 4/5-42/81 4/35-6/81