Add 80/72 and 70/84
1st number: 1 8/72, 2nd number: 70/84
80/72 + 70/84 is 35/18.
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,
80/72 = 80 × 7/72 × 7 = 560/504 - Likewise, for the 2nd fraction, since 84 × 6 = 504,
70/84 = 70 × 6/84 × 6 = 420/504 - Add the two like fractions:
560/504 + 420/504 = 560 + 420/504 = 980/504 - 980/504 simplified gives 35/18
- So, 80/72 + 70/84 = 35/18
In mixed form: 117/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: