Add 30/72 and 3/7
30/72 + 3/7 is 71/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 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 7 × 72 = 504,
3/7 = 3 × 72/7 × 72 = 216/504 - Add the two like fractions:
210/504 + 216/504 = 210 + 216/504 = 426/504 - 426/504 simplified gives 71/84
- So, 30/72 + 3/7 = 71/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72+3/7 30/72+6/7 30/72+3/14 90/72+3/7 30/72+9/7 30/72+3/21 30/72+15/7 30/72+3/35 30/72+21/7 30/72+3/49