Add 3/84 and 28/20
1st number: 3/84, 2nd number: 1 8/20
3/84 + 28/20 is 201/140.
Steps for adding fractions
- 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 - For the 1st fraction, since 84 × 5 = 420,
3/84 = 3 × 5/84 × 5 = 15/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
28/20 = 28 × 21/20 × 21 = 588/420 - Add the two like fractions:
15/420 + 588/420 = 15 + 588/420 = 603/420 - 603/420 simplified gives 201/140
- So, 3/84 + 28/20 = 201/140
In mixed form: 161/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84+28/20 3/84+56/20 3/84+28/40 9/84+28/20 3/84+84/20 3/84+28/60 15/84+28/20 21/84+28/20