Add 3/21 and 20/49
3/21 + 20/49 is 27/49.
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,
20/49 = 20 × 3/49 × 3 = 60/147 - Add the two like fractions:
21/147 + 60/147 = 21 + 60/147 = 81/147 - 81/147 simplified gives 27/49
- So, 3/21 + 20/49 = 27/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+20/49 3/21+40/49 3/42+20/49 3/21+20/98 9/21+20/49 3/21+60/49 3/63+20/49 15/21+20/49