Add 21/7 and 80/10
1st number: 3 0/7, 2nd number: 8 0/10
21/7 + 80/10 is 11/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
80/10 = 80 × 7/10 × 7 = 560/70 - Add the two like fractions:
210/70 + 560/70 = 210 + 560/70 = 770/70 - 770/70 simplified gives 11/1
- So, 21/7 + 80/10 = 11/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+80/10 21/14+80/10 21/7+80/20 63/7+80/10 21/7+80/30 21/35+80/10 21/7+80/50 21/49+80/10 21/7+80/70