Answers

Add 81/18 and 54/7

1^st number: 4 9/18, 2^nd number: 7 5/7

81/18 + 54/7 is 171/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 7 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   81/18 = 81 × 7/18 × 7 = 567/126
3. Likewise, for the 2nd fraction, since 7 × 18 = 126,
   54/7 = 54 × 18/7 × 18 = 972/126
4. Add the two like fractions:
   567/126 + 972/126 = 567 + 972/126 = 1539/126
5. 1539/126 simplified gives 171/14
6. So, 81/18 + 54/7 = 171/14
   In mixed form: 123/14

MathStep (Works offline)

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

Related: ⁸¹/₃₆+⁵⁴/₇ ⁸¹/₁₈+⁵⁴/₁₄ ⁸¹/₅₄+⁵⁴/₇ ⁸¹/₁₈+⁵⁴/₂₁ ⁸¹/₉₀+⁵⁴/₇ ⁸¹/₁₈+⁵⁴/₃₅ ⁸¹/₁₈+⁵⁴/₄₉

Add Fractions Calculator