Add 12/42 and 54/30
1st number: 12/42, 2nd number: 1 24/30
12/42 + 54/30 is 73/35.
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,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
54/30 = 54 × 7/30 × 7 = 378/210 - Add the two like fractions:
60/210 + 378/210 = 60 + 378/210 = 438/210 - 438/210 simplified gives 73/35
- So, 12/42 + 54/30 = 73/35
In mixed form: 23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+54/30 12/84+54/30 12/42+54/60 36/42+54/30 12/42+54/90 60/42+54/30 84/42+54/30