Add 5/42 and 54/72
5/42 + 54/72 is 73/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
5/42 = 5 × 12/42 × 12 = 60/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
54/72 = 54 × 7/72 × 7 = 378/504 - Add the two like fractions:
60/504 + 378/504 = 60 + 378/504 = 438/504 - 438/504 simplified gives 73/84
- So, 5/42 + 54/72 = 73/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42+54/72 5/84+54/72 15/42+54/72 25/42+54/72 35/42+54/72