Add 8/21 and 6/42
8/21 + 6/42 is 11/21.
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,
8/21 = 8 × 2/21 × 2 = 16/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
6/42 = 6 × 1/42 × 1 = 6/42 - Add the two like fractions:
16/42 + 6/42 = 16 + 6/42 = 22/42 - 22/42 simplified gives 11/21
- So, 8/21 + 6/42 = 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+6/42 8/21+12/42 8/42+6/42 8/21+6/84 24/21+6/42 8/21+18/42 8/63+6/42 40/21+6/42 8/21+30/42 56/21+6/42