Subtract 2/81 from 42/3
1st number: 14 0/3, 2nd number: 2/81
42/3 - 2/81 is 1132/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
42/3 = 42 × 27/3 × 27 = 1134/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
2/81 = 2 × 1/81 × 1 = 2/81 - Subtract the two like fractions:
1134/81 - 2/81 = 1134 - 2/81 = 1132/81 - In mixed form: 1379/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/3-2/81 42/3-4/81 42/6-2/81 42/3-6/81 42/9-2/81 42/3-10/81 42/15-2/81 42/3-14/81 42/21-2/81