Answers

Add 7/18 and 54/21

1^st number: 7/18, 2^nd number: 2 12/21

7/18 + 54/21 is 373/126.

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,
   7/18 = 7 × 7/18 × 7 = 49/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   54/21 = 54 × 6/21 × 6 = 324/126
4. Add the two like fractions:
   49/126 + 324/126 = 49 + 324/126 = 373/126
5. So, 7/18 + 54/21 = 373/126
   In mixed form: 2121/126

MathStep (Works offline)

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

Related: ¹⁴/₁₈+⁵⁴/₂₁ ⁷/₃₆+⁵⁴/₂₁ ⁷/₁₈+⁵⁴/₄₂ ²¹/₁₈+⁵⁴/₂₁ ⁷/₅₄+⁵⁴/₂₁ ⁷/₁₈+⁵⁴/₆₃ ³⁵/₁₈+⁵⁴/₂₁ ⁷/₉₀+⁵⁴/₂₁ ⁴⁹/₁₈+⁵⁴/₂₁

Add Fractions Calculator