Answers

Add 70/84 and 7/63

70/84 + 7/63 is 17/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   70/84 = 70 × 3/84 × 3 = 210/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   7/63 = 7 × 4/63 × 4 = 28/252
4. Add the two like fractions:
   210/252 + 28/252 = 210 + 28/252 = 238/252
5. 238/252 simplified gives 17/18
6. So, 70/84 + 7/63 = 17/18

MathStep (Works offline)

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

Related: ⁷⁰/₈₄+¹⁴/₆₃ ⁷⁰/₈₄+²¹/₆₃ ⁷⁰/₈₄+³⁵/₆₃ ⁷⁰/₈₄+⁴⁹/₆₃

Add Fractions Calculator