Add 90/10 and 70/81
1st number: 9 0/10, 2nd number: 70/81
90/10 + 70/81 is 799/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 10 × 81 = 810,
90/10 = 90 × 81/10 × 81 = 7290/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
70/81 = 70 × 10/81 × 10 = 700/810 - Add the two like fractions:
7290/810 + 700/810 = 7290 + 700/810 = 7990/810 - 7990/810 simplified gives 799/81
- So, 90/10 + 70/81 = 799/81
In mixed form: 970/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+70/81 90/30+70/81 90/50+70/81 90/70+70/81