Add 30/72 and 54/56
30/72 + 54/56 is 29/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
30/72 = 30 × 7/72 × 7 = 210/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
54/56 = 54 × 9/56 × 9 = 486/504 - Add the two like fractions:
210/504 + 486/504 = 210 + 486/504 = 696/504 - 696/504 simplified gives 29/21
- So, 30/72 + 54/56 = 29/21
In mixed form: 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72+54/56 90/72+54/56