Add 72/42 and 28/30
1st number: 1 30/42, 2nd number: 28/30
72/42 + 28/30 is 278/105.
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,
28/30 = 28 × 7/30 × 7 = 196/210 - Add the two like fractions:
360/210 + 196/210 = 360 + 196/210 = 556/210 - 556/210 simplified gives 278/105
- So, 72/42 + 28/30 = 278/105
In mixed form: 268/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+56/30 72/84+28/30 72/42+28/60 72/42+84/30 72/42+28/90