Answers

Add 72/36 and 9/80

1^st number: 2 0/36, 2^nd number: 9/80

72/36 + 9/80 is 169/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 36 × 20 = 720,
   72/36 = 72 × 20/36 × 20 = 1440/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   9/80 = 9 × 9/80 × 9 = 81/720
4. Add the two like fractions:
   1440/720 + 81/720 = 1440 + 81/720 = 1521/720
5. 1521/720 simplified gives 169/80
6. So, 72/36 + 9/80 = 169/80
   In mixed form: 29/80

MathStep (Works offline)

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

Related: ⁷²/₃₆+¹⁸/₈₀ ⁷²/₃₆+²⁷/₈₀ ⁷²/₃₆+⁴⁵/₈₀ ⁷²/₃₆+⁶³/₈₀

Add Fractions Calculator