Add 3/21 and 18/49
3/21 + 18/49 is 25/49.
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,
18/49 = 18 × 3/49 × 3 = 54/147 - Add the two like fractions:
21/147 + 54/147 = 21 + 54/147 = 75/147 - 75/147 simplified gives 25/49
- So, 3/21 + 18/49 = 25/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+18/49 3/21+36/49 3/42+18/49 3/21+18/98 9/21+18/49 3/21+54/49 3/63+18/49 15/21+18/49 3/21+90/49