Add 21/7 and 4/10
1st number: 3 0/7, 2nd number: 4/10
21/7 + 4/10 is 17/5.
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,
4/10 = 4 × 7/10 × 7 = 28/70 - Add the two like fractions:
210/70 + 28/70 = 210 + 28/70 = 238/70 - 238/70 simplified gives 17/5
- So, 21/7 + 4/10 = 17/5
In mixed form: 32/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+4/10 21/7+8/10 21/14+4/10 21/7+4/20 63/7+4/10 21/7+12/10 21/7+4/30 21/7+20/10 21/35+4/10 21/7+4/50 21/7+28/10 21/49+4/10 21/7+4/70