Add 21/98 and 12/70
21/98 + 12/70 is 27/70.
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,
12/70 = 12 × 7/70 × 7 = 84/490 - Add the two like fractions:
105/490 + 84/490 = 105 + 84/490 = 189/490 - 189/490 simplified gives 27/70
- So, 21/98 + 12/70 = 27/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+12/70 21/98+24/70 63/98+12/70 21/98+36/70 21/98+60/70 21/98+84/70