Add 72/42 and 9/30
1st number: 1 30/42, 2nd number: 9/30
72/42 + 9/30 is 141/70.
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,
72/42 = 72 × 5/42 × 5 = 360/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
9/30 = 9 × 7/30 × 7 = 63/210 - Add the two like fractions:
360/210 + 63/210 = 360 + 63/210 = 423/210 - 423/210 simplified gives 141/70
- So, 72/42 + 9/30 = 141/70
In mixed form: 21/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+18/30 72/84+9/30 72/42+9/60 72/42+27/30 72/42+9/90 72/42+45/30 72/42+63/30