Answers

Add 81/27 and 42/49

1^st number: 3 0/27, 2^nd number: 42/49

81/27 + 42/49 is 27/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 49 is 1323
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1323
2. For the 1st fraction, since 27 × 49 = 1323,
   81/27 = 81 × 49/27 × 49 = 3969/1323
3. Likewise, for the 2nd fraction, since 49 × 27 = 1323,
   42/49 = 42 × 27/49 × 27 = 1134/1323
4. Add the two like fractions:
   3969/1323 + 1134/1323 = 3969 + 1134/1323 = 5103/1323
5. 5103/1323 simplified gives 27/7
6. So, 81/27 + 42/49 = 27/7
   In mixed form: 36/7

MathStep (Works offline)

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

Related: ⁸¹/₂₇+⁸⁴/₄₉ ⁸¹/₅₄+⁴²/₄₉ ⁸¹/₂₇+⁴²/₉₈

Add Fractions Calculator