Answers

Add 63/20 and 36/42

1^st number: 3 3/20, 2^nd number: 36/42

63/20 + 36/42 is 561/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   63/20 = 63 × 21/20 × 21 = 1323/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   36/42 = 36 × 10/42 × 10 = 360/420
4. Add the two like fractions:
   1323/420 + 360/420 = 1323 + 360/420 = 1683/420
5. 1683/420 simplified gives 561/140
6. So, 63/20 + 36/42 = 561/140
   In mixed form: 41/140

MathStep (Works offline)

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

Related: ⁶³/₂₀+⁷²/₄₂ ⁶³/₄₀+³⁶/₄₂ ⁶³/₂₀+³⁶/₈₄ ⁶³/₆₀+³⁶/₄₂

Add Fractions Calculator