Answers

Add 84/15 and 40/84

1^st number: 5 9/15, 2^nd number: 40/84

84/15 + 40/84 is 638/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 15 × 28 = 420,
   84/15 = 84 × 28/15 × 28 = 2352/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   40/84 = 40 × 5/84 × 5 = 200/420
4. Add the two like fractions:
   2352/420 + 200/420 = 2352 + 200/420 = 2552/420
5. 2552/420 simplified gives 638/105
6. So, 84/15 + 40/84 = 638/105
   In mixed form: 68/105

MathStep (Works offline)

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

Related: ⁸⁴/₁₅+⁸⁰/₈₄ ⁸⁴/₃₀+⁴⁰/₈₄ ⁸⁴/₄₅+⁴⁰/₈₄ ⁸⁴/₇₅+⁴⁰/₈₄

Add Fractions Calculator