Add 84/42 and 7/15
1st number: 2 0/42, 2nd number: 7/15
84/42 + 7/15 is 37/15.
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,
7/15 = 7 × 14/15 × 14 = 98/210 - Add the two like fractions:
420/210 + 98/210 = 420 + 98/210 = 518/210 - 518/210 simplified gives 37/15
- So, 84/42 + 7/15 = 37/15
In mixed form: 27/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+14/15 84/42+7/30 84/42+21/15 84/42+7/45 84/42+35/15 84/42+7/75 84/42+49/15