Add 18/72 and 27/42
18/72 + 27/42 is 25/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
27/42 = 27 × 12/42 × 12 = 324/504 - Add the two like fractions:
126/504 + 324/504 = 126 + 324/504 = 450/504 - 450/504 simplified gives 25/28
- So, 18/72 + 27/42 = 25/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+27/42 18/72+54/42 18/72+27/84 54/72+27/42 18/72+81/42 90/72+27/42