Add 6/21 and 8/42
6/21 + 8/42 is 10/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
6/21 = 6 × 2/21 × 2 = 12/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
8/42 = 8 × 1/42 × 1 = 8/42 - Add the two like fractions:
12/42 + 8/42 = 12 + 8/42 = 20/42 - 20/42 simplified gives 10/21
- So, 6/21 + 8/42 = 10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+8/42 6/21+16/42 6/42+8/42 6/21+8/84 18/21+8/42 6/21+24/42 6/63+8/42 30/21+8/42 6/21+40/42 42/21+8/42 6/21+56/42