Answers

Add 7/45 and 6/81

7/45 + 6/81 is 31/135.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 45 × 9 = 405,
   7/45 = 7 × 9/45 × 9 = 63/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   6/81 = 6 × 5/81 × 5 = 30/405
4. Add the two like fractions:
   63/405 + 30/405 = 63 + 30/405 = 93/405
5. 93/405 simplified gives 31/135
6. So, 7/45 + 6/81 = 31/135

MathStep (Works offline)

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

Related: ¹⁴/₄₅+⁶/₈₁ ⁷/₄₅+¹²/₈₁ ⁷/₉₀+⁶/₈₁ ²¹/₄₅+⁶/₈₁ ⁷/₄₅+¹⁸/₈₁ ³⁵/₄₅+⁶/₈₁ ⁷/₄₅+³⁰/₈₁ ⁴⁹/₄₅+⁶/₈₁ ⁷/₄₅+⁴²/₈₁

Add Fractions Calculator