Add 12/27 and 42/30
1st number: 12/27, 2nd number: 1 12/30
12/27 + 42/30 is 83/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 30 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
12/27 = 12 × 10/27 × 10 = 120/270 - Likewise, for the 2nd fraction, since 30 × 9 = 270,
42/30 = 42 × 9/30 × 9 = 378/270 - Add the two like fractions:
120/270 + 378/270 = 120 + 378/270 = 498/270 - 498/270 simplified gives 83/45
- So, 12/27 + 42/30 = 83/45
In mixed form: 138/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27+42/30 12/27+84/30 12/54+42/30 12/27+42/60 36/27+42/30 12/81+42/30 12/27+42/90 60/27+42/30 84/27+42/30