Answers

Add 70/42 and 25/20

1^st number: 1 28/42, 2^nd number: 1 5/20

70/42 + 25/20 is 35/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   70/42 = 70 × 10/42 × 10 = 700/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   25/20 = 25 × 21/20 × 21 = 525/420
4. Add the two like fractions:
   700/420 + 525/420 = 700 + 525/420 = 1225/420
5. 1225/420 simplified gives 35/12
6. So, 70/42 + 25/20 = 35/12
   In mixed form: 211/12

MathStep (Works offline)

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

Related: ⁷⁰/₄₂+⁵⁰/₂₀ ⁷⁰/₈₄+²⁵/₂₀ ⁷⁰/₄₂+²⁵/₄₀ ⁷⁰/₄₂+⁷⁵/₂₀ ⁷⁰/₄₂+²⁵/₆₀

Add Fractions Calculator