Answers

Add 81/18 and 60/72

1^st number: 4 9/18, 2^nd number: 60/72

81/18 + 60/72 is 16/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 18 × 4 = 72,
   81/18 = 81 × 4/18 × 4 = 324/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   60/72 = 60 × 1/72 × 1 = 60/72
4. Add the two like fractions:
   324/72 + 60/72 = 324 + 60/72 = 384/72
5. 384/72 simplified gives 16/3
6. So, 81/18 + 60/72 = 16/3
   In mixed form: 51/3

MathStep (Works offline)

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

Related: ⁸¹/₃₆+⁶⁰/₇₂ ⁸¹/₅₄+⁶⁰/₇₂ ⁸¹/₉₀+⁶⁰/₇₂

Add Fractions Calculator