Add 20/28 and 10/72
20/28 + 10/72 is 215/252.
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,
20/28 = 20 × 18/28 × 18 = 360/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
10/72 = 10 × 7/72 × 7 = 70/504 - Add the two like fractions:
360/504 + 70/504 = 360 + 70/504 = 430/504 - 430/504 simplified gives 215/252
- So, 20/28 + 10/72 = 215/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+10/72 20/28+20/72 20/56+10/72 60/28+10/72 20/28+30/72 20/84+10/72 20/28+50/72 20/28+70/72