Answers

Add 28/63 and 12/15

28/63 + 12/15 is 56/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 15 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 63 × 5 = 315,
   28/63 = 28 × 5/63 × 5 = 140/315
3. Likewise, for the 2nd fraction, since 15 × 21 = 315,
   12/15 = 12 × 21/15 × 21 = 252/315
4. Add the two like fractions:
   140/315 + 252/315 = 140 + 252/315 = 392/315
5. 392/315 simplified gives 56/45
6. So, 28/63 + 12/15 = 56/45
   In mixed form: 111/45

MathStep (Works offline)

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

Related: ⁵⁶/₆₃+¹²/₁₅ ²⁸/₆₃+²⁴/₁₅ ²⁸/₆₃+¹²/₃₀ ⁸⁴/₆₃+¹²/₁₅ ²⁸/₆₃+³⁶/₁₅ ²⁸/₆₃+¹²/₄₅ ²⁸/₆₃+⁶⁰/₁₅ ²⁸/₆₃+¹²/₇₅ ²⁸/₆₃+⁸⁴/₁₅

Add Fractions Calculator