Add 21/49 and 15/30
21/49 + 15/30 is 13/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 30 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 49 × 30 = 1470,
21/49 = 21 × 30/49 × 30 = 630/1470 - Likewise, for the 2nd fraction, since 30 × 49 = 1470,
15/30 = 15 × 49/30 × 49 = 735/1470 - Add the two like fractions:
630/1470 + 735/1470 = 630 + 735/1470 = 1365/1470 - 1365/1470 simplified gives 13/14
- So, 21/49 + 15/30 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49+15/30 21/98+15/30 21/49+15/60 63/49+15/30 21/49+45/30 21/49+15/90 21/49+75/30