Answers

Add 8/9 and 9/10

8/9 + 9/10 is 161/90.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 10 is 90
2. For the 1st fraction, since 9 × 10 = 90,
   8/9 = 8 × 10/9 × 10 = 80/90
3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
   9/10 = 9 × 9/10 × 9 = 81/90
4. Add the two fractions:
   80/90 + 81/90 = 80 + 81/90 = 161/90
5. So, 8/9 + 9/10 = 161/90
   In mixed form: 171/90

MathStep (Works offline)

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

Related: ¹⁶/₉+⁹/₁₀ ⁸/₉+¹⁸/₁₀ ⁸/₁₈+⁹/₁₀ ⁸/₉+⁹/₂₀ ²⁴/₉+⁹/₁₀ ⁸/₉+²⁷/₁₀ ⁸/₂₇+⁹/₁₀ ⁸/₉+⁹/₃₀ ⁴⁰/₉+⁹/₁₀ ⁸/₉+⁴⁵/₁₀ ⁸/₄₅+⁹/₁₀ ⁸/₉+⁹/₅₀ ⁵⁶/₉+⁹/₁₀ ⁸/₉+⁶³/₁₀ ⁸/₆₃+⁹/₁₀ ⁸/₉+⁹/₇₀

Add Fractions Calculator