Add 15/42 and 70/35
1st number: 15/42, 2nd number: 2 0/35
15/42 + 70/35 is 33/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
70/35 = 70 × 6/35 × 6 = 420/210 - Add the two like fractions:
75/210 + 420/210 = 75 + 420/210 = 495/210 - 495/210 simplified gives 33/14
- So, 15/42 + 70/35 = 33/14
In mixed form: 25/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+70/35 15/84+70/35 45/42+70/35 75/42+70/35