Add 70/98 and 18/21
70/98 + 18/21 is 11/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 21 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 98 × 3 = 294,
70/98 = 70 × 3/98 × 3 = 210/294 - Likewise, for the 2nd fraction, since 21 × 14 = 294,
18/21 = 18 × 14/21 × 14 = 252/294 - Add the two like fractions:
210/294 + 252/294 = 210 + 252/294 = 462/294 - 462/294 simplified gives 11/7
- So, 70/98 + 18/21 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/98+36/21 70/98+18/42 70/98+54/21 70/98+18/63 70/98+90/21