Answers

Add 81/28 and 35/15

1^st number: 2 25/28, 2^nd number: 2 5/15

81/28 + 35/15 is 439/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 15 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 28 × 15 = 420,
   81/28 = 81 × 15/28 × 15 = 1215/420
3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
   35/15 = 35 × 28/15 × 28 = 980/420
4. Add the two like fractions:
   1215/420 + 980/420 = 1215 + 980/420 = 2195/420
5. 2195/420 simplified gives 439/84
6. So, 81/28 + 35/15 = 439/84
   In mixed form: 519/84

MathStep (Works offline)

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

Related: ⁸¹/₂₈+⁷⁰/₁₅ ⁸¹/₅₆+³⁵/₁₅ ⁸¹/₂₈+³⁵/₃₀ ⁸¹/₈₄+³⁵/₁₅ ⁸¹/₂₈+³⁵/₄₅ ⁸¹/₂₈+³⁵/₇₅

Add Fractions Calculator