Add 70/30 and 21/98
1st number: 2 10/30, 2nd number: 21/98
70/30 + 21/98 is 107/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 98 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 30 × 49 = 1470,
70/30 = 70 × 49/30 × 49 = 3430/1470 - Likewise, for the 2nd fraction, since 98 × 15 = 1470,
21/98 = 21 × 15/98 × 15 = 315/1470 - Add the two like fractions:
3430/1470 + 315/1470 = 3430 + 315/1470 = 3745/1470 - 3745/1470 simplified gives 107/42
- So, 70/30 + 21/98 = 107/42
In mixed form: 223/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/30+42/98 70/60+21/98 70/30+63/98 70/90+21/98