Add 70/10 and 3/21
1st number: 7 0/10, 2nd number: 3/21
70/10 + 3/21 is 50/7.
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,
70/10 = 70 × 21/10 × 21 = 1470/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
3/21 = 3 × 10/21 × 10 = 30/210 - Add the two like fractions:
1470/210 + 30/210 = 1470 + 30/210 = 1500/210 - 1500/210 simplified gives 50/7
- So, 70/10 + 3/21 = 50/7
In mixed form: 71/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/10+6/21 70/20+3/21 70/10+3/42 70/10+9/21 70/30+3/21 70/10+3/63 70/10+15/21 70/50+3/21