Add 30/70 and 70/98
30/70 + 70/98 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 98 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
30/70 = 30 × 7/70 × 7 = 210/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
70/98 = 70 × 5/98 × 5 = 350/490 - Add the two like fractions:
210/490 + 350/490 = 210 + 350/490 = 560/490 - 560/490 simplified gives 8/7
- So, 30/70 + 70/98 = 8/7
In mixed form: 11/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+70/98 90/70+70/98