Add 72/42 and 36/54
1st number: 1 30/42, 2nd number: 36/54
72/42 + 36/54 is 50/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 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 54 × 7 = 378,
36/54 = 36 × 7/54 × 7 = 252/378 - Add the two like fractions:
648/378 + 252/378 = 648 + 252/378 = 900/378 - 900/378 simplified gives 50/21
- So, 72/42 + 36/54 = 50/21
In mixed form: 28/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+72/54 72/84+36/54