Answers

Add 10/84 and 80/20

1^st number: 10/84, 2^nd number: 4 0/20

10/84 + 80/20 is 173/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   10/84 = 10 × 5/84 × 5 = 50/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   80/20 = 80 × 21/20 × 21 = 1680/420
4. Add the two like fractions:
   50/420 + 1680/420 = 50 + 1680/420 = 1730/420
5. 1730/420 simplified gives 173/42
6. So, 10/84 + 80/20 = 173/42
   In mixed form: 45/42

MathStep (Works offline)

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

Related: ²⁰/₈₄+⁸⁰/₂₀ ¹⁰/₈₄+⁸⁰/₄₀ ³⁰/₈₄+⁸⁰/₂₀ ¹⁰/₈₄+⁸⁰/₆₀ ⁵⁰/₈₄+⁸⁰/₂₀ ⁷⁰/₈₄+⁸⁰/₂₀

Add Fractions Calculator