Add 3/42 and 42/30
1st number: 3/42, 2nd number: 1 12/30
3/42 + 42/30 is 103/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 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 30 × 7 = 210,
42/30 = 42 × 7/30 × 7 = 294/210 - Add the two like fractions:
15/210 + 294/210 = 15 + 294/210 = 309/210 - 309/210 simplified gives 103/70
- So, 3/42 + 42/30 = 103/70
In mixed form: 133/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+42/30 3/42+84/30 3/84+42/30 3/42+42/60 9/42+42/30 3/42+42/90 15/42+42/30 21/42+42/30