Answers

Add 24/21 and 45/81

1^st number: 1 3/21, 2^nd number: 45/81

24/21 + 45/81 is 107/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 21 × 27 = 567,
   24/21 = 24 × 27/21 × 27 = 648/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   45/81 = 45 × 7/81 × 7 = 315/567
4. Add the two like fractions:
   648/567 + 315/567 = 648 + 315/567 = 963/567
5. 963/567 simplified gives 107/63
6. So, 24/21 + 45/81 = 107/63
   In mixed form: 144/63

MathStep (Works offline)

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

Related: ⁴⁸/₂₁+⁴⁵/₈₁ ²⁴/₂₁+⁹⁰/₈₁ ²⁴/₄₂+⁴⁵/₈₁ ⁷²/₂₁+⁴⁵/₈₁ ²⁴/₆₃+⁴⁵/₈₁

Add Fractions Calculator