Add 36/70 and 72/81
36/70 + 72/81 is 442/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
36/70 = 36 × 81/70 × 81 = 2916/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
72/81 = 72 × 70/81 × 70 = 5040/5670 - Add the two like fractions:
2916/5670 + 5040/5670 = 2916 + 5040/5670 = 7956/5670 - 7956/5670 simplified gives 442/315
- So, 36/70 + 72/81 = 442/315
In mixed form: 1127/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/70+72/81