Answers

Add 15/25 and 70/42

1^st number: 15/25, 2^nd number: 1 28/42

15/25 + 70/42 is 34/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 42 is 1050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1050
2. For the 1st fraction, since 25 × 42 = 1050,
   15/25 = 15 × 42/25 × 42 = 630/1050
3. Likewise, for the 2nd fraction, since 42 × 25 = 1050,
   70/42 = 70 × 25/42 × 25 = 1750/1050
4. Add the two like fractions:
   630/1050 + 1750/1050 = 630 + 1750/1050 = 2380/1050
5. 2380/1050 simplified gives 34/15
6. So, 15/25 + 70/42 = 34/15
   In mixed form: 24/15

MathStep (Works offline)

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

Related: ³⁰/₂₅+⁷⁰/₄₂ ¹⁵/₅₀+⁷⁰/₄₂ ¹⁵/₂₅+⁷⁰/₈₄ ⁴⁵/₂₅+⁷⁰/₄₂ ¹⁵/₇₅+⁷⁰/₄₂ ⁷⁵/₂₅+⁷⁰/₄₂

Add Fractions Calculator