Add 30/72 and 70/84
30/72 + 70/84 is 5/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 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 84 × 6 = 504,
70/84 = 70 × 6/84 × 6 = 420/504 - Add the two like fractions:
210/504 + 420/504 = 210 + 420/504 = 630/504 - 630/504 simplified gives 5/4
- So, 30/72 + 70/84 = 5/4
In mixed form: 11/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72+70/84 90/72+70/84