Answers

Add 27/21 and 42/54

1^st number: 1 6/21, 2^nd number: 42/54

27/21 + 42/54 is 130/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 21 × 18 = 378,
   27/21 = 27 × 18/21 × 18 = 486/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   42/54 = 42 × 7/54 × 7 = 294/378
4. Add the two like fractions:
   486/378 + 294/378 = 486 + 294/378 = 780/378
5. 780/378 simplified gives 130/63
6. So, 27/21 + 42/54 = 130/63
   In mixed form: 24/63

MathStep (Works offline)

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

Related: ⁵⁴/₂₁+⁴²/₅₄ ²⁷/₂₁+⁸⁴/₅₄ ²⁷/₄₂+⁴²/₅₄ ⁸¹/₂₁+⁴²/₅₄ ²⁷/₆₃+⁴²/₅₄

Add Fractions Calculator