Add 3/42 and 75/70
1st number: 3/42, 2nd number: 1 5/70
3/42 + 75/70 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
3/42 = 3 × 5/42 × 5 = 15/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
75/70 = 75 × 3/70 × 3 = 225/210 - Add the two like fractions:
15/210 + 225/210 = 15 + 225/210 = 240/210 - 240/210 simplified gives 8/7
- So, 3/42 + 75/70 = 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: 6/42+75/70 3/84+75/70 9/42+75/70 15/42+75/70 21/42+75/70