Answers

Add 42/54 and 45/12

1^st number: 42/54, 2^nd number: 3 9/12

42/54 + 45/12 is 163/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 12 is 108
   
   Next, find the equivalent fraction of both fractional numbers with denominator 108
2. For the 1st fraction, since 54 × 2 = 108,
   42/54 = 42 × 2/54 × 2 = 84/108
3. Likewise, for the 2nd fraction, since 12 × 9 = 108,
   45/12 = 45 × 9/12 × 9 = 405/108
4. Add the two like fractions:
   84/108 + 405/108 = 84 + 405/108 = 489/108
5. 489/108 simplified gives 163/36
6. So, 42/54 + 45/12 = 163/36
   In mixed form: 419/36

MathStep (Works offline)

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

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

Add Fractions Calculator