Add 8/10 and 12/21
8/10 + 12/21 is 48/35.
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,
12/21 = 12 × 10/21 × 10 = 120/210 - Add the two like fractions:
168/210 + 120/210 = 168 + 120/210 = 288/210 - 288/210 simplified gives 48/35
- So, 8/10 + 12/21 = 48/35
In mixed form: 113/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10+12/21 8/10+24/21 8/20+12/21 8/10+12/42 24/10+12/21 8/10+36/21 8/30+12/21 8/10+12/63 40/10+12/21 8/10+60/21 8/50+12/21 56/10+12/21 8/10+84/21 8/70+12/21