Add 45/42 and 72/30
1st number: 1 3/42, 2nd number: 2 12/30
45/42 + 72/30 is 243/70.
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,
45/42 = 45 × 5/42 × 5 = 225/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210 - Add the two like fractions:
225/210 + 504/210 = 225 + 504/210 = 729/210 - 729/210 simplified gives 243/70
- So, 45/42 + 72/30 = 243/70
In mixed form: 333/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+72/30 45/84+72/30 45/42+72/60 45/42+72/90