Add 40/42 and 6/15
40/42 + 6/15 is 142/105.
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,
40/42 = 40 × 5/42 × 5 = 200/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
6/15 = 6 × 14/15 × 14 = 84/210 - Add the two like fractions:
200/210 + 84/210 = 200 + 84/210 = 284/210 - 284/210 simplified gives 142/105
- So, 40/42 + 6/15 = 142/105
In mixed form: 137/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+6/15 40/42+12/15 40/84+6/15 40/42+6/30 40/42+18/15 40/42+6/45 40/42+30/15 40/42+6/75 40/42+42/15