Answers

Add 21/45 and 56/18

1^st number: 21/45, 2^nd number: 3 2/18

21/45 + 56/18 is 161/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 18 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 45 × 2 = 90,
   21/45 = 21 × 2/45 × 2 = 42/90
3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
   56/18 = 56 × 5/18 × 5 = 280/90
4. Add the two like fractions:
   42/90 + 280/90 = 42 + 280/90 = 322/90
5. 322/90 simplified gives 161/45
6. So, 21/45 + 56/18 = 161/45
   In mixed form: 326/45

MathStep (Works offline)

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

Related: ⁴²/₄₅+⁵⁶/₁₈ ²¹/₉₀+⁵⁶/₁₈ ²¹/₄₅+⁵⁶/₃₆ ⁶³/₄₅+⁵⁶/₁₈ ²¹/₄₅+⁵⁶/₅₄ ²¹/₄₅+⁵⁶/₉₀

Add Fractions Calculator