Add 10/42 and 40/15
1st number: 10/42, 2nd number: 2 10/15
10/42 + 40/15 is 61/21.
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,
10/42 = 10 × 5/42 × 5 = 50/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
40/15 = 40 × 14/15 × 14 = 560/210 - Add the two like fractions:
50/210 + 560/210 = 50 + 560/210 = 610/210 - 610/210 simplified gives 61/21
- So, 10/42 + 40/15 = 61/21
In mixed form: 219/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+40/15 10/42+80/15 10/84+40/15 10/42+40/30 30/42+40/15 10/42+40/45 50/42+40/15 10/42+40/75 70/42+40/15