Subtract 2/5 from 84/81
1st number: 1 3/81, 2nd number: 2/5
84/81 - 2/5 is 86/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 5 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
84/81 = 84 × 5/81 × 5 = 420/405 - Likewise, for the 2nd fraction, since 5 × 81 = 405,
2/5 = 2 × 81/5 × 81 = 162/405 - Subtract the two like fractions:
420/405 - 162/405 = 420 - 162/405 = 258/405 - After reducing the fraction, the answer is 86/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81-4/5 84/81-2/10 84/81-6/5 84/81-2/15 84/81-10/5 84/81-2/25 84/81-14/5 84/81-2/35