Answers

Add 81/54 and 18/72

1^st number: 1 27/54, 2^nd number: 18/72

81/54 + 18/72 is 7/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 72 is 216
   
   Next, find the equivalent fraction of both fractional numbers with denominator 216
2. For the 1st fraction, since 54 × 4 = 216,
   81/54 = 81 × 4/54 × 4 = 324/216
3. Likewise, for the 2nd fraction, since 72 × 3 = 216,
   18/72 = 18 × 3/72 × 3 = 54/216
4. Add the two like fractions:
   324/216 + 54/216 = 324 + 54/216 = 378/216
5. 378/216 simplified gives 7/4
6. So, 81/54 + 18/72 = 7/4
   In mixed form: 13/4

MathStep (Works offline)

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

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

Add Fractions Calculator