Answers

Add 84/42 and 15/60

1^st number: 2 0/42, 2^nd number: 15/60

84/42 + 15/60 is 9/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   84/42 = 84 × 10/42 × 10 = 840/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   15/60 = 15 × 7/60 × 7 = 105/420
4. Add the two like fractions:
   840/420 + 105/420 = 840 + 105/420 = 945/420
5. 945/420 simplified gives 9/4
6. So, 84/42 + 15/60 = 9/4
   In mixed form: 21/4

MathStep (Works offline)

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

Related: ⁸⁴/₄₂+³⁰/₆₀ ⁸⁴/₄₂+⁴⁵/₆₀ ⁸⁴/₄₂+⁷⁵/₆₀

Add Fractions Calculator