Answers

Add 54/21 and 7/18

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

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

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 21 × 6 = 126,
   54/21 = 54 × 6/21 × 6 = 324/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   7/18 = 7 × 7/18 × 7 = 49/126
4. Add the two like fractions:
   324/126 + 49/126 = 324 + 49/126 = 373/126
5. So, 54/21 + 7/18 = 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: ⁵⁴/₂₁+¹⁴/₁₈ ⁵⁴/₄₂+⁷/₁₈ ⁵⁴/₂₁+⁷/₃₆ ⁵⁴/₂₁+²¹/₁₈ ⁵⁴/₆₃+⁷/₁₈ ⁵⁴/₂₁+⁷/₅₄ ⁵⁴/₂₁+³⁵/₁₈ ⁵⁴/₂₁+⁷/₉₀ ⁵⁴/₂₁+⁴⁹/₁₈

Add Fractions Calculator