Answers

Add 54/18 and 63/28

1^st number: 3 0/18, 2^nd number: 2 7/28

54/18 + 63/28 is 21/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 28 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 18 × 14 = 252,
   54/18 = 54 × 14/18 × 14 = 756/252
3. Likewise, for the 2nd fraction, since 28 × 9 = 252,
   63/28 = 63 × 9/28 × 9 = 567/252
4. Add the two like fractions:
   756/252 + 567/252 = 756 + 567/252 = 1323/252
5. 1323/252 simplified gives 21/4
6. So, 54/18 + 63/28 = 21/4
   In mixed form: 51/4

MathStep (Works offline)

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

Related: ⁵⁴/₃₆+⁶³/₂₈ ⁵⁴/₁₈+⁶³/₅₆ ⁵⁴/₁₈+⁶³/₈₄ ⁵⁴/₉₀+⁶³/₂₈

Add Fractions Calculator