Answers

Add 45/4 and 10/21

1^st number: 11 1/4, 2^nd number: 10/21

45/4 + 10/21 is 985/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 4 × 21 = 84,
   45/4 = 45 × 21/4 × 21 = 945/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   10/21 = 10 × 4/21 × 4 = 40/84
4. Add the two like fractions:
   945/84 + 40/84 = 945 + 40/84 = 985/84
5. So, 45/4 + 10/21 = 985/84
   In mixed form: 1161/84

MathStep (Works offline)

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

Related: ⁹⁰/₄+¹⁰/₂₁ ⁴⁵/₄+²⁰/₂₁ ⁴⁵/₈+¹⁰/₂₁ ⁴⁵/₄+¹⁰/₄₂ ⁴⁵/₄+³⁰/₂₁ ⁴⁵/₁₂+¹⁰/₂₁ ⁴⁵/₄+¹⁰/₆₃ ⁴⁵/₄+⁵⁰/₂₁ ⁴⁵/₂₀+¹⁰/₂₁ ⁴⁵/₄+⁷⁰/₂₁ ⁴⁵/₂₈+¹⁰/₂₁

Add Fractions Calculator