Add 2/21 and 12/42
2/21 + 12/42 is 8/21.
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,
2/21 = 2 × 2/21 × 2 = 4/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
12/42 = 12 × 1/42 × 1 = 12/42 - Add the two like fractions:
4/42 + 12/42 = 4 + 12/42 = 16/42 - 16/42 simplified gives 8/21
- So, 2/21 + 12/42 = 8/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+12/42 2/21+24/42 2/42+12/42 2/21+12/84 6/21+12/42 2/21+36/42 2/63+12/42 10/21+12/42 2/21+60/42 14/21+12/42 2/21+84/42