Answers

Add 81/50 and 20/72

1^st number: 1 31/50, 2^nd number: 20/72

81/50 + 20/72 is 427/225.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 72 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 50 × 36 = 1800,
   81/50 = 81 × 36/50 × 36 = 2916/1800
3. Likewise, for the 2nd fraction, since 72 × 25 = 1800,
   20/72 = 20 × 25/72 × 25 = 500/1800
4. Add the two like fractions:
   2916/1800 + 500/1800 = 2916 + 500/1800 = 3416/1800
5. 3416/1800 simplified gives 427/225
6. So, 81/50 + 20/72 = 427/225
   In mixed form: 1202/225

MathStep (Works offline)

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

Related: ⁸¹/₅₀+⁴⁰/₇₂ ⁸¹/₅₀+⁶⁰/₇₂

Add Fractions Calculator