Add 45/42 and 54/72
1st number: 1 3/42, 2nd number: 54/72
45/42 + 54/72 is 51/28.
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,
45/42 = 45 × 12/42 × 12 = 540/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
54/72 = 54 × 7/72 × 7 = 378/504 - Add the two like fractions:
540/504 + 378/504 = 540 + 378/504 = 918/504 - 918/504 simplified gives 51/28
- So, 45/42 + 54/72 = 51/28
In mixed form: 123/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+54/72 45/84+54/72