Add 12/84 and 35/15
1st number: 12/84, 2nd number: 2 5/15
12/84 + 35/15 is 52/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
12/84 = 12 × 5/84 × 5 = 60/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
35/15 = 35 × 28/15 × 28 = 980/420 - Add the two like fractions:
60/420 + 980/420 = 60 + 980/420 = 1040/420 - 1040/420 simplified gives 52/21
- So, 12/84 + 35/15 = 52/21
In mixed form: 210/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84+35/15 12/84+70/15 12/84+35/30 36/84+35/15 12/84+35/45 60/84+35/15 12/84+35/75