Add 21/49 and 9/70
21/49 + 9/70 is 39/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
21/49 = 21 × 10/49 × 10 = 210/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
9/70 = 9 × 7/70 × 7 = 63/490 - Add the two like fractions:
210/490 + 63/490 = 210 + 63/490 = 273/490 - 273/490 simplified gives 39/70
- So, 21/49 + 9/70 = 39/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49+9/70 21/49+18/70 21/98+9/70 63/49+9/70 21/49+27/70 21/49+45/70 21/49+63/70