Add 5/28 and 90/72
1st number: 5/28, 2nd number: 1 18/72
5/28 + 90/72 is 10/7.
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,
5/28 = 5 × 18/28 × 18 = 90/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504 - Add the two like fractions:
90/504 + 630/504 = 90 + 630/504 = 720/504 - 720/504 simplified gives 10/7
- So, 5/28 + 90/72 = 10/7
In mixed form: 13/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28+90/72 5/56+90/72 15/28+90/72 5/84+90/72 25/28+90/72 35/28+90/72