Add 8/90 and 81/70
1st number: 8/90, 2nd number: 1 11/70
8/90 + 81/70 is 157/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
8/90 = 8 × 7/90 × 7 = 56/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
81/70 = 81 × 9/70 × 9 = 729/630 - Add the two like fractions:
56/630 + 729/630 = 56 + 729/630 = 785/630 - 785/630 simplified gives 157/126
- So, 8/90 + 81/70 = 157/126
In mixed form: 131/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90+81/70 24/90+81/70 40/90+81/70 56/90+81/70