Add 81/72 and 30/42
1st number: 1 9/72, 2nd number: 30/42
81/72 + 30/42 is 103/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
81/72 = 81 × 7/72 × 7 = 567/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
30/42 = 30 × 12/42 × 12 = 360/504 - Add the two like fractions:
567/504 + 360/504 = 567 + 360/504 = 927/504 - 927/504 simplified gives 103/56
- So, 81/72 + 30/42 = 103/56
In mixed form: 147/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/72+60/42 81/72+30/84 81/72+90/42