Answers

Add 10/30 and 70/21

1^st number: 10/30, 2^nd number: 3 7/21

10/30 + 70/21 is 11/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   10/30 = 10 × 7/30 × 7 = 70/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   70/21 = 70 × 10/21 × 10 = 700/210
4. Add the two like fractions:
   70/210 + 700/210 = 70 + 700/210 = 770/210
5. 770/210 simplified gives 11/3
6. So, 10/30 + 70/21 = 11/3
   In mixed form: 32/3

MathStep (Works offline)

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

Related: ²⁰/₃₀+⁷⁰/₂₁ ¹⁰/₆₀+⁷⁰/₂₁ ¹⁰/₃₀+⁷⁰/₄₂ ¹⁰/₉₀+⁷⁰/₂₁ ¹⁰/₃₀+⁷⁰/₆₃ ⁵⁰/₃₀+⁷⁰/₂₁ ⁷⁰/₃₀+⁷⁰/₂₁

Add Fractions Calculator