Add 1/42 and 45/30
1st number: 1/42, 2nd number: 1 15/30
1/42 + 45/30 is 32/21.
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,
1/42 = 1 × 5/42 × 5 = 5/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Add the two like fractions:
5/210 + 315/210 = 5 + 315/210 = 320/210 - 320/210 simplified gives 32/21
- So, 1/42 + 45/30 = 32/21
In mixed form: 111/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42+45/30 1/42+90/30 1/84+45/30 1/42+45/60 3/42+45/30 1/42+45/90 5/42+45/30 7/42+45/30