Answers

Add 28/84 and 4/80

28/84 + 4/80 is 23/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 84 × 20 = 1680,
   28/84 = 28 × 20/84 × 20 = 560/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   4/80 = 4 × 21/80 × 21 = 84/1680
4. Add the two like fractions:
   560/1680 + 84/1680 = 560 + 84/1680 = 644/1680
5. 644/1680 simplified gives 23/60
6. So, 28/84 + 4/80 = 23/60

MathStep (Works offline)

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

Related: ⁵⁶/₈₄+⁴/₈₀ ²⁸/₈₄+⁸/₈₀ ²⁸/₈₄+¹²/₈₀ ²⁸/₈₄+²⁰/₈₀ ²⁸/₈₄+²⁸/₈₀

Add Fractions Calculator