Answers

Add 81/18 and 42/54

1^st number: 4 9/18, 2^nd number: 42/54

81/18 + 42/54 is 95/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 54 is 54
   
   Next, find the equivalent fraction of both fractional numbers with denominator 54
2. For the 1st fraction, since 18 × 3 = 54,
   81/18 = 81 × 3/18 × 3 = 243/54
3. Likewise, for the 2nd fraction, since 54 × 1 = 54,
   42/54 = 42 × 1/54 × 1 = 42/54
4. Add the two like fractions:
   243/54 + 42/54 = 243 + 42/54 = 285/54
5. 285/54 simplified gives 95/18
6. So, 81/18 + 42/54 = 95/18
   In mixed form: 55/18

MathStep (Works offline)

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

Related: ⁸¹/₁₈+⁸⁴/₅₄ ⁸¹/₃₆+⁴²/₅₄ ⁸¹/₅₄+⁴²/₅₄ ⁸¹/₉₀+⁴²/₅₄

Add Fractions Calculator