Add 3/42 and 45/30
1st number: 3/42, 2nd number: 1 15/30
3/42 + 45/30 is 11/7.
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,
45/30 = 45 × 7/30 × 7 = 315/210 - Add the two like fractions:
15/210 + 315/210 = 15 + 315/210 = 330/210 - 330/210 simplified gives 11/7
- So, 3/42 + 45/30 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+45/30 3/42+90/30 3/84+45/30 3/42+45/60 9/42+45/30 3/42+45/90 15/42+45/30 21/42+45/30