Answers

Add 42/20 and 54/42

1^st number: 2 2/20, 2^nd number: 1 12/42

42/20 + 54/42 is 237/70.

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,
   42/20 = 42 × 21/20 × 21 = 882/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   54/42 = 54 × 10/42 × 10 = 540/420
4. Add the two like fractions:
   882/420 + 540/420 = 882 + 540/420 = 1422/420
5. 1422/420 simplified gives 237/70
6. So, 42/20 + 54/42 = 237/70
   In mixed form: 327/70

MathStep (Works offline)

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

Related: ⁸⁴/₂₀+⁵⁴/₄₂ ⁴²/₄₀+⁵⁴/₄₂ ⁴²/₂₀+⁵⁴/₈₄ ⁴²/₆₀+⁵⁴/₄₂

Add Fractions Calculator