Answers

Add 81/10 and 27/80

1^st number: 8 1/10, 2^nd number: 27/80

81/10 + 27/80 is 135/16.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 10 × 8 = 80,
   81/10 = 81 × 8/10 × 8 = 648/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   27/80 = 27 × 1/80 × 1 = 27/80
4. Add the two like fractions:
   648/80 + 27/80 = 648 + 27/80 = 675/80
5. 675/80 simplified gives 135/16
6. So, 81/10 + 27/80 = 135/16
   In mixed form: 87/16

MathStep (Works offline)

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

Related: ⁸¹/₁₀+⁵⁴/₈₀ ⁸¹/₂₀+²⁷/₈₀ ⁸¹/₁₀+⁸¹/₈₀ ⁸¹/₃₀+²⁷/₈₀ ⁸¹/₅₀+²⁷/₈₀ ⁸¹/₇₀+²⁷/₈₀

Add Fractions Calculator