Answers

Add 42/63 and 4/81

42/63 + 4/81 is 58/81.

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,
   42/63 = 42 × 9/63 × 9 = 378/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   4/81 = 4 × 7/81 × 7 = 28/567
4. Add the two like fractions:
   378/567 + 28/567 = 378 + 28/567 = 406/567
5. 406/567 simplified gives 58/81
6. So, 42/63 + 4/81 = 58/81

MathStep (Works offline)

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

Related: ⁸⁴/₆₃+⁴/₈₁ ⁴²/₆₃+⁸/₈₁ ⁴²/₆₃+¹²/₈₁ ⁴²/₆₃+²⁰/₈₁ ⁴²/₆₃+²⁸/₈₁

Add Fractions Calculator