Answers

Add 45/84 and 20/8

1^st number: 45/84, 2^nd number: 2 4/8

45/84 + 20/8 is 85/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 8 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 84 × 2 = 168,
   45/84 = 45 × 2/84 × 2 = 90/168
3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
   20/8 = 20 × 21/8 × 21 = 420/168
4. Add the two like fractions:
   90/168 + 420/168 = 90 + 420/168 = 510/168
5. 510/168 simplified gives 85/28
6. So, 45/84 + 20/8 = 85/28
   In mixed form: 31/28

MathStep (Works offline)

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

Related: ⁹⁰/₈₄+²⁰/₈ ⁴⁵/₈₄+⁴⁰/₈ ⁴⁵/₈₄+²⁰/₁₆ ⁴⁵/₈₄+⁶⁰/₈ ⁴⁵/₈₄+²⁰/₂₄ ⁴⁵/₈₄+²⁰/₄₀ ⁴⁵/₈₄+²⁰/₅₆

Add Fractions Calculator