Answers

Add 21/10 and 56/84

1^st number: 2 1/10, 2^nd number: 56/84

21/10 + 56/84 is 83/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 10 × 42 = 420,
   21/10 = 21 × 42/10 × 42 = 882/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   56/84 = 56 × 5/84 × 5 = 280/420
4. Add the two like fractions:
   882/420 + 280/420 = 882 + 280/420 = 1162/420
5. 1162/420 simplified gives 83/30
6. So, 21/10 + 56/84 = 83/30
   In mixed form: 223/30

MathStep (Works offline)

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

Related: ⁴²/₁₀+⁵⁶/₈₄ ²¹/₂₀+⁵⁶/₈₄ ⁶³/₁₀+⁵⁶/₈₄ ²¹/₃₀+⁵⁶/₈₄ ²¹/₅₀+⁵⁶/₈₄ ²¹/₇₀+⁵⁶/₈₄

Add Fractions Calculator