Answers

Add 21/20 and 45/16

1^st number: 1 1/20, 2^nd number: 2 13/16

21/20 + 45/16 is 309/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   21/20 = 21 × 4/20 × 4 = 84/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   45/16 = 45 × 5/16 × 5 = 225/80
4. Add the two like fractions:
   84/80 + 225/80 = 84 + 225/80 = 309/80
5. So, 21/20 + 45/16 = 309/80
   In mixed form: 369/80

MathStep (Works offline)

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

Related: ⁴²/₂₀+⁴⁵/₁₆ ²¹/₂₀+⁹⁰/₁₆ ²¹/₄₀+⁴⁵/₁₆ ²¹/₂₀+⁴⁵/₃₂ ⁶³/₂₀+⁴⁵/₁₆ ²¹/₆₀+⁴⁵/₁₆ ²¹/₂₀+⁴⁵/₄₈ ²¹/₂₀+⁴⁵/₈₀

Add Fractions Calculator