Answers

Add 4/20 and 72/63

1^st number: 4/20, 2^nd number: 1 9/63

4/20 + 72/63 is 47/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 20 × 63 = 1260,
   4/20 = 4 × 63/20 × 63 = 252/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   72/63 = 72 × 20/63 × 20 = 1440/1260
4. Add the two like fractions:
   252/1260 + 1440/1260 = 252 + 1440/1260 = 1692/1260
5. 1692/1260 simplified gives 47/35
6. So, 4/20 + 72/63 = 47/35
   In mixed form: 112/35

MathStep (Works offline)

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

Related: ⁸/₂₀+⁷²/₆₃ ⁴/₄₀+⁷²/₆₃ ¹²/₂₀+⁷²/₆₃ ⁴/₆₀+⁷²/₆₃ ²⁸/₂₀+⁷²/₆₃

Add Fractions Calculator