Add 8/10 and 21/7
1st number: 8/10, 2nd number: 3 0/7
8/10 + 21/7 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
8/10 = 8 × 7/10 × 7 = 56/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Add the two like fractions:
56/70 + 210/70 = 56 + 210/70 = 266/70 - 266/70 simplified gives 19/5
- So, 8/10 + 21/7 = 19/5
In mixed form: 34/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10+21/7 8/10+42/7 8/20+21/7 8/10+21/14 24/10+21/7 8/10+63/7 8/30+21/7 40/10+21/7 8/50+21/7 8/10+21/35 56/10+21/7 8/70+21/7 8/10+21/49