Add 20/84 and 12/5
1st number: 20/84, 2nd number: 2 2/5
20/84 + 12/5 is 277/105.
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,
20/84 = 20 × 5/84 × 5 = 100/420 - Likewise, for the 2nd fraction, since 5 × 84 = 420,
12/5 = 12 × 84/5 × 84 = 1008/420 - Add the two like fractions:
100/420 + 1008/420 = 100 + 1008/420 = 1108/420 - 1108/420 simplified gives 277/105
- So, 20/84 + 12/5 = 277/105
In mixed form: 267/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+12/5 20/84+24/5 20/84+12/10 60/84+12/5 20/84+36/5 20/84+12/15 20/84+60/5 20/84+12/25 20/84+84/5 20/84+12/35