Add 8/10 and 80/21
1st number: 8/10, 2nd number: 3 17/21
8/10 + 80/21 is 484/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
8/10 = 8 × 21/10 × 21 = 168/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
80/21 = 80 × 10/21 × 10 = 800/210 - Add the two like fractions:
168/210 + 800/210 = 168 + 800/210 = 968/210 - 968/210 simplified gives 484/105
- So, 8/10 + 80/21 = 484/105
In mixed form: 464/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10+80/21 8/20+80/21 8/10+80/42 24/10+80/21 8/30+80/21 8/10+80/63 40/10+80/21 8/50+80/21 56/10+80/21 8/70+80/21