Answers

Add 25/8 and 40/81

1^st number: 3 1/8, 2^nd number: 40/81

25/8 + 40/81 is 2345/648.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 8 × 81 = 648,
   25/8 = 25 × 81/8 × 81 = 2025/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   40/81 = 40 × 8/81 × 8 = 320/648
4. Add the two like fractions:
   2025/648 + 320/648 = 2025 + 320/648 = 2345/648
5. So, 25/8 + 40/81 = 2345/648
   In mixed form: 3401/648

MathStep (Works offline)

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

Related: ⁵⁰/₈+⁴⁰/₈₁ ²⁵/₈+⁸⁰/₈₁ ²⁵/₁₆+⁴⁰/₈₁ ⁷⁵/₈+⁴⁰/₈₁ ²⁵/₂₄+⁴⁰/₈₁ ²⁵/₄₀+⁴⁰/₈₁ ²⁵/₅₆+⁴⁰/₈₁

Add Fractions Calculator