Add 21/98 and 30/70
21/98 + 30/70 is 9/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
21/98 = 21 × 5/98 × 5 = 105/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
30/70 = 30 × 7/70 × 7 = 210/490 - Add the two like fractions:
105/490 + 210/490 = 105 + 210/490 = 315/490 - 315/490 simplified gives 9/14
- So, 21/98 + 30/70 = 9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+30/70 21/98+60/70 63/98+30/70 21/98+90/70