Add 84/42 and 12/15
1st number: 2 0/42, 2nd number: 12/15
84/42 + 12/15 is 14/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
12/15 = 12 × 14/15 × 14 = 168/210 - Add the two like fractions:
420/210 + 168/210 = 420 + 168/210 = 588/210 - 588/210 simplified gives 14/5
- So, 84/42 + 12/15 = 14/5
In mixed form: 24/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+24/15 84/42+12/30 84/42+36/15 84/42+12/45 84/42+60/15 84/42+12/75 84/42+84/15