Answers

Add 18/20 and 35/40

18/20 + 35/40 is 71/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 40 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 20 × 2 = 40,
   18/20 = 18 × 2/20 × 2 = 36/40
3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
   35/40 = 35 × 1/40 × 1 = 35/40
4. Add the two like fractions:
   36/40 + 35/40 = 36 + 35/40 = 71/40
5. So, 18/20 + 35/40 = 71/40
   In mixed form: 131/40

MathStep (Works offline)

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

Related: ³⁶/₂₀+³⁵/₄₀ ¹⁸/₂₀+⁷⁰/₄₀ ¹⁸/₄₀+³⁵/₄₀ ¹⁸/₂₀+³⁵/₈₀ ⁵⁴/₂₀+³⁵/₄₀ ¹⁸/₆₀+³⁵/₄₀ ⁹⁰/₂₀+³⁵/₄₀

Add Fractions Calculator