Answers

Add 3/21 and 70/7

1^st number: 3/21, 2^nd number: 10 0/7

3/21 + 70/7 is 71/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 7 is 21
   
   Next, find the equivalent fraction of both fractional numbers with denominator 21
2. For the 1st fraction, since 21 × 1 = 21,
   3/21 = 3 × 1/21 × 1 = 3/21
3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
   70/7 = 70 × 3/7 × 3 = 210/21
4. Add the two like fractions:
   3/21 + 210/21 = 3 + 210/21 = 213/21
5. 213/21 simplified gives 71/7
6. So, 3/21 + 70/7 = 71/7
   In mixed form: 101/7

MathStep (Works offline)

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

Related: ⁶/₂₁+⁷⁰/₇ ³/₄₂+⁷⁰/₇ ³/₂₁+⁷⁰/₁₄ ⁹/₂₁+⁷⁰/₇ ³/₆₃+⁷⁰/₇ ³/₂₁+⁷⁰/₂₁ ¹⁵/₂₁+⁷⁰/₇ ³/₂₁+⁷⁰/₃₅ ³/₂₁+⁷⁰/₄₉

Add Fractions Calculator