Add 28/42 and 54/60
28/42 + 54/60 is 47/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
28/42 = 28 × 10/42 × 10 = 280/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
54/60 = 54 × 7/60 × 7 = 378/420 - Add the two like fractions:
280/420 + 378/420 = 280 + 378/420 = 658/420 - 658/420 simplified gives 47/30
- So, 28/42 + 54/60 = 47/30
In mixed form: 117/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+54/60 28/84+54/60 84/42+54/60