Answers

Add 81/54 and 70/7

1^st number: 1 27/54, 2^nd number: 10 0/7

81/54 + 70/7 is 23/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 7 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   81/54 = 81 × 7/54 × 7 = 567/378
3. Likewise, for the 2nd fraction, since 7 × 54 = 378,
   70/7 = 70 × 54/7 × 54 = 3780/378
4. Add the two like fractions:
   567/378 + 3780/378 = 567 + 3780/378 = 4347/378
5. 4347/378 simplified gives 23/2
6. So, 81/54 + 70/7 = 23/2
   In mixed form: 111/2

MathStep (Works offline)

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

Related: ⁸¹/₅₄+⁷⁰/₁₄ ⁸¹/₅₄+⁷⁰/₂₁ ⁸¹/₅₄+⁷⁰/₃₅ ⁸¹/₅₄+⁷⁰/₄₉

Add Fractions Calculator