Add 12/35 and 70/42
1st number: 12/35, 2nd number: 1 28/42
12/35 + 70/42 is 211/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
12/35 = 12 × 6/35 × 6 = 72/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
70/42 = 70 × 5/42 × 5 = 350/210 - Add the two like fractions:
72/210 + 350/210 = 72 + 350/210 = 422/210 - 422/210 simplified gives 211/105
- So, 12/35 + 70/42 = 211/105
In mixed form: 21/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/35+70/42 12/70+70/42 12/35+70/84 36/35+70/42 60/35+70/42 84/35+70/42