Answers

Add 90/15 and 30/63

1^st number: 6 0/15, 2^nd number: 30/63

90/15 + 30/63 is 136/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 63 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 15 × 21 = 315,
   90/15 = 90 × 21/15 × 21 = 1890/315
3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
   30/63 = 30 × 5/63 × 5 = 150/315
4. Add the two like fractions:
   1890/315 + 150/315 = 1890 + 150/315 = 2040/315
5. 2040/315 simplified gives 136/21
6. So, 90/15 + 30/63 = 136/21
   In mixed form: 610/21

MathStep (Works offline)

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

Related: ⁹⁰/₁₅+⁶⁰/₆₃ ⁹⁰/₃₀+³⁰/₆₃ ⁹⁰/₁₅+⁹⁰/₆₃ ⁹⁰/₄₅+³⁰/₆₃ ⁹⁰/₇₅+³⁰/₆₃

Add Fractions Calculator