Answers

Add 45/12 and 54/72

1^st number: 3 9/12, 2^nd number: 54/72

45/12 + 54/72 is 9/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 12 × 6 = 72,
   45/12 = 45 × 6/12 × 6 = 270/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   54/72 = 54 × 1/72 × 1 = 54/72
4. Add the two like fractions:
   270/72 + 54/72 = 270 + 54/72 = 324/72
5. 324/72 simplified gives 9/2
6. So, 45/12 + 54/72 = 9/2
   In mixed form: 41/2

MathStep (Works offline)

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

Related: ⁹⁰/₁₂+⁵⁴/₇₂ ⁴⁵/₂₄+⁵⁴/₇₂ ⁴⁵/₃₆+⁵⁴/₇₂ ⁴⁵/₆₀+⁵⁴/₇₂ ⁴⁵/₈₄+⁵⁴/₇₂

Add Fractions Calculator