Add 28/70 and 49/42
1st number: 28/70, 2nd number: 1 7/42
28/70 + 49/42 is 47/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
28/70 = 28 × 3/70 × 3 = 84/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
49/42 = 49 × 5/42 × 5 = 245/210 - Add the two like fractions:
84/210 + 245/210 = 84 + 245/210 = 329/210 - 329/210 simplified gives 47/30
- So, 28/70 + 49/42 = 47/30
In mixed form: 117/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70+49/42 28/70+98/42 28/70+49/84 84/70+49/42