Add 14/42 and 20/72
14/42 + 20/72 is 11/18.
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,
14/42 = 14 × 12/42 × 12 = 168/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Add the two like fractions:
168/504 + 140/504 = 168 + 140/504 = 308/504 - 308/504 simplified gives 11/18
- So, 14/42 + 20/72 = 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/42+20/72 14/42+40/72 14/84+20/72 14/42+60/72 70/42+20/72 98/42+20/72