Add 8/42 and 6/21
8/42 + 6/21 is 10/21.
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,
8/42 = 8 × 1/42 × 1 = 8/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
6/21 = 6 × 2/21 × 2 = 12/42 - Add the two like fractions:
8/42 + 12/42 = 8 + 12/42 = 20/42 - 20/42 simplified gives 10/21
- So, 8/42 + 6/21 = 10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+6/21 8/42+12/21 8/84+6/21 8/42+6/42 24/42+6/21 8/42+18/21 8/42+6/63 40/42+6/21 8/42+30/21 56/42+6/21 8/42+42/21