Answers

Add 7/63 and 84/81

1^st number: 7/63, 2^nd number: 1 3/81

7/63 + 84/81 is 31/27.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 63 × 9 = 567,
   7/63 = 7 × 9/63 × 9 = 63/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   84/81 = 84 × 7/81 × 7 = 588/567
4. Add the two like fractions:
   63/567 + 588/567 = 63 + 588/567 = 651/567
5. 651/567 simplified gives 31/27
6. So, 7/63 + 84/81 = 31/27
   In mixed form: 14/27

MathStep (Works offline)

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

Related: ¹⁴/₆₃+⁸⁴/₈₁ ²¹/₆₃+⁸⁴/₈₁ ³⁵/₆₃+⁸⁴/₈₁ ⁴⁹/₆₃+⁸⁴/₈₁

Add Fractions Calculator