Add 72/42 and 30/72
1st number: 1 30/42, 2nd number: 30/72
72/42 + 30/72 is 179/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
72/42 = 72 × 12/42 × 12 = 864/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
30/72 = 30 × 7/72 × 7 = 210/504 - Add the two like fractions:
864/504 + 210/504 = 864 + 210/504 = 1074/504 - 1074/504 simplified gives 179/84
- So, 72/42 + 30/72 = 179/84
In mixed form: 211/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+60/72 72/84+30/72 72/42+90/72