Answers

Add 5/18 and 54/21

1^st number: 5/18, 2^nd number: 2 12/21

5/18 + 54/21 is 359/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   5/18 = 5 × 7/18 × 7 = 35/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   54/21 = 54 × 6/21 × 6 = 324/126
4. Add the two like fractions:
   35/126 + 324/126 = 35 + 324/126 = 359/126
5. So, 5/18 + 54/21 = 359/126
   In mixed form: 2107/126

MathStep (Works offline)

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

Related: ¹⁰/₁₈+⁵⁴/₂₁ ⁵/₃₆+⁵⁴/₂₁ ⁵/₁₈+⁵⁴/₄₂ ¹⁵/₁₈+⁵⁴/₂₁ ⁵/₅₄+⁵⁴/₂₁ ⁵/₁₈+⁵⁴/₆₃ ²⁵/₁₈+⁵⁴/₂₁ ⁵/₉₀+⁵⁴/₂₁ ³⁵/₁₈+⁵⁴/₂₁

Add Fractions Calculator