Answers

Add 81/12 and 80/28

1^st number: 6 9/12, 2^nd number: 2 24/28

81/12 + 80/28 is 269/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 28 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 12 × 7 = 84,
   81/12 = 81 × 7/12 × 7 = 567/84
3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
   80/28 = 80 × 3/28 × 3 = 240/84
4. Add the two like fractions:
   567/84 + 240/84 = 567 + 240/84 = 807/84
5. 807/84 simplified gives 269/28
6. So, 81/12 + 80/28 = 269/28
   In mixed form: 917/28

MathStep (Works offline)

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

Related: ⁸¹/₂₄+⁸⁰/₂₈ ⁸¹/₁₂+⁸⁰/₅₆ ⁸¹/₃₆+⁸⁰/₂₈ ⁸¹/₁₂+⁸⁰/₈₄ ⁸¹/₆₀+⁸⁰/₂₈ ⁸¹/₈₄+⁸⁰/₂₈

Add Fractions Calculator