Answers

Add 21/90 and 56/16

1^st number: 21/90, 2^nd number: 3 8/16

21/90 + 56/16 is 56/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 16 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 90 × 8 = 720,
   21/90 = 21 × 8/90 × 8 = 168/720
3. Likewise, for the 2nd fraction, since 16 × 45 = 720,
   56/16 = 56 × 45/16 × 45 = 2520/720
4. Add the two like fractions:
   168/720 + 2520/720 = 168 + 2520/720 = 2688/720
5. 2688/720 simplified gives 56/15
6. So, 21/90 + 56/16 = 56/15
   In mixed form: 311/15

MathStep (Works offline)

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

Related: ⁴²/₉₀+⁵⁶/₁₆ ²¹/₉₀+⁵⁶/₃₂ ⁶³/₉₀+⁵⁶/₁₆ ²¹/₉₀+⁵⁶/₄₈ ²¹/₉₀+⁵⁶/₈₀

Add Fractions Calculator