Add 28/84 and 20/5
1st number: 28/84, 2nd number: 4 0/5
28/84 + 20/5 is 13/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 5 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
28/84 = 28 × 5/84 × 5 = 140/420 - Likewise, for the 2nd fraction, since 5 × 84 = 420,
20/5 = 20 × 84/5 × 84 = 1680/420 - Add the two like fractions:
140/420 + 1680/420 = 140 + 1680/420 = 1820/420 - 1820/420 simplified gives 13/3
- So, 28/84 + 20/5 = 13/3
In mixed form: 41/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+20/5 28/84+40/5 28/84+20/10 28/84+60/5 28/84+20/15 28/84+20/25 28/84+20/35