Add 72/42 and 72/27
1st number: 1 30/42, 2nd number: 2 18/27
72/42 + 72/27 is 92/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
72/42 = 72 × 9/42 × 9 = 648/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
72/27 = 72 × 14/27 × 14 = 1008/378 - Add the two like fractions:
648/378 + 1008/378 = 648 + 1008/378 = 1656/378 - 1656/378 simplified gives 92/21
- So, 72/42 + 72/27 = 92/21
In mixed form: 48/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84+72/27 72/42+72/54 72/42+72/81