Add 7/28 and 7/72
7/28 + 7/72 is 25/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
7/28 = 7 × 18/28 × 18 = 126/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
7/72 = 7 × 7/72 × 7 = 49/504 - Add the two like fractions:
126/504 + 49/504 = 126 + 49/504 = 175/504 - 175/504 simplified gives 25/72
- So, 7/28 + 7/72 = 25/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+7/72 7/28+14/72 7/56+7/72 21/28+7/72 7/28+21/72 7/84+7/72 35/28+7/72 7/28+35/72 49/28+7/72 7/28+49/72