Add 4/21 and 5/42
4/21 + 5/42 is 13/42.
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,
4/21 = 4 × 2/21 × 2 = 8/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
5/42 = 5 × 1/42 × 1 = 5/42 - Add the two like fractions:
8/42 + 5/42 = 8 + 5/42 = 13/42 - So, 4/21 + 5/42 = 13/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+5/42 4/21+10/42 4/42+5/42 4/21+5/84 12/21+5/42 4/21+15/42 4/63+5/42 20/21+5/42 4/21+25/42 28/21+5/42 4/21+35/42