Answers

Subtract 24/81 from 90/45

1^st number: 2 0/45, 2^nd number: 24/81

90/45 - 24/81 is 46/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 45 × 9 = 405,
   90/45 = 90 × 9/45 × 9 = 810/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   24/81 = 24 × 5/81 × 5 = 120/405
4. Subtract the two like fractions:
   810/405 - 120/405 = 810 - 120/405 = 690/405
5. After reducing the fraction, the answer is 46/27
6. In mixed form: 119/27

MathStep (Works offline)

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

Related: ⁹⁰/₄₅-⁴⁸/₈₁ ⁹⁰/₄₅-⁷²/₈₁

Subtract Fractions Calculator