Answers

Subtract 90/81 from 4/3

1^st number: 1 1/3, 2^nd number: 1 9/81

4/3 - 90/81 is 2/9.

Steps for subtracting fractions

1. 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
2. For the 1st fraction, since 3 × 27 = 81,
   4/3 = 4 × 27/3 × 27 = 108/81
3. Likewise, for the 2nd fraction, since 81 × 1 = 81,
   90/81 = 90 × 1/81 × 1 = 90/81
4. Subtract the two like fractions:
   108/81 - 90/81 = 108 - 90/81 = 18/81
5. After reducing the fraction, the answer is 2/9

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁸/₃-⁹⁰/₈₁ ⁴/₆-⁹⁰/₈₁ ¹²/₃-⁹⁰/₈₁ ⁴/₉-⁹⁰/₈₁ ²⁰/₃-⁹⁰/₈₁ ⁴/₁₅-⁹⁰/₈₁ ²⁸/₃-⁹⁰/₈₁ ⁴/₂₁-⁹⁰/₈₁

Subtract Fractions Calculator