Answers

Add 42/12 and 45/54

1^st number: 3 6/12, 2^nd number: 45/54

42/12 + 45/54 is 13/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 54 is 108
   
   Next, find the equivalent fraction of both fractional numbers with denominator 108
2. For the 1st fraction, since 12 × 9 = 108,
   42/12 = 42 × 9/12 × 9 = 378/108
3. Likewise, for the 2nd fraction, since 54 × 2 = 108,
   45/54 = 45 × 2/54 × 2 = 90/108
4. Add the two like fractions:
   378/108 + 90/108 = 378 + 90/108 = 468/108
5. 468/108 simplified gives 13/3
6. So, 42/12 + 45/54 = 13/3
   In mixed form: 41/3

MathStep (Works offline)

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

Related: ⁸⁴/₁₂+⁴⁵/₅₄ ⁴²/₁₂+⁹⁰/₅₄ ⁴²/₂₄+⁴⁵/₅₄ ⁴²/₃₆+⁴⁵/₅₄ ⁴²/₆₀+⁴⁵/₅₄ ⁴²/₈₄+⁴⁵/₅₄

Add Fractions Calculator