Answers

Add 42/30 and 56/81

1^st number: 1 12/30, 2^nd number: 56/81

42/30 + 56/81 is 847/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 30 × 27 = 810,
   42/30 = 42 × 27/30 × 27 = 1134/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   56/81 = 56 × 10/81 × 10 = 560/810
4. Add the two like fractions:
   1134/810 + 560/810 = 1134 + 560/810 = 1694/810
5. 1694/810 simplified gives 847/405
6. So, 42/30 + 56/81 = 847/405
   In mixed form: 237/405

MathStep (Works offline)

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

Related: ⁸⁴/₃₀+⁵⁶/₈₁ ⁴²/₆₀+⁵⁶/₈₁ ⁴²/₉₀+⁵⁶/₈₁

Add Fractions Calculator