Answers

Add 15/90 and 70/63

1^st number: 15/90, 2^nd number: 1 7/63

15/90 + 70/63 is 23/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 63 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   15/90 = 15 × 7/90 × 7 = 105/630
3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
   70/63 = 70 × 10/63 × 10 = 700/630
4. Add the two like fractions:
   105/630 + 700/630 = 105 + 700/630 = 805/630
5. 805/630 simplified gives 23/18
6. So, 15/90 + 70/63 = 23/18
   In mixed form: 15/18

MathStep (Works offline)

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

Related: ³⁰/₉₀+⁷⁰/₆₃ ⁴⁵/₉₀+⁷⁰/₆₃ ⁷⁵/₉₀+⁷⁰/₆₃

Add Fractions Calculator