Add 90/7 and 72/70
1st number: 12 6/7, 2nd number: 1 2/70
90/7 + 72/70 is 486/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
90/7 = 90 × 10/7 × 10 = 900/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
72/70 = 72 × 1/70 × 1 = 72/70 - Add the two like fractions:
900/70 + 72/70 = 900 + 72/70 = 972/70 - 972/70 simplified gives 486/35
- So, 90/7 + 72/70 = 486/35
In mixed form: 1331/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14+72/70 90/21+72/70 90/35+72/70 90/49+72/70