Add 6/42 and 15/21
6/42 + 15/21 is 6/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
6/42 = 6 × 1/42 × 1 = 6/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Add the two like fractions:
6/42 + 30/42 = 6 + 30/42 = 36/42 - 36/42 simplified gives 6/7
- So, 6/42 + 15/21 = 6/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42+15/21 6/42+30/21 6/84+15/21 6/42+15/42 18/42+15/21 6/42+45/21 6/42+15/63 30/42+15/21 6/42+75/21