Add 3/21 and 15/49
3/21 + 15/49 is 22/49.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
3/21 = 3 × 7/21 × 7 = 21/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
15/49 = 15 × 3/49 × 3 = 45/147 - Add the two like fractions:
21/147 + 45/147 = 21 + 45/147 = 66/147 - 66/147 simplified gives 22/49
- So, 3/21 + 15/49 = 22/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+15/49 3/21+30/49 3/42+15/49 3/21+15/98 9/21+15/49 3/21+45/49 3/63+15/49 15/21+15/49 3/21+75/49