Answers

Add 81/27 and 21/35

1^st number: 3 0/27, 2^nd number: 21/35

81/27 + 21/35 is 18/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 35 is 945
   
   Next, find the equivalent fraction of both fractional numbers with denominator 945
2. For the 1st fraction, since 27 × 35 = 945,
   81/27 = 81 × 35/27 × 35 = 2835/945
3. Likewise, for the 2nd fraction, since 35 × 27 = 945,
   21/35 = 21 × 27/35 × 27 = 567/945
4. Add the two like fractions:
   2835/945 + 567/945 = 2835 + 567/945 = 3402/945
5. 3402/945 simplified gives 18/5
6. So, 81/27 + 21/35 = 18/5
   In mixed form: 33/5

MathStep (Works offline)

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

Related: ⁸¹/₂₇+⁴²/₃₅ ⁸¹/₅₄+²¹/₃₅ ⁸¹/₂₇+²¹/₇₀ ⁸¹/₂₇+⁶³/₃₅

Add Fractions Calculator