Add 70/21 and 40/10
1st number: 3 7/21, 2nd number: 4 0/10
70/21 + 40/10 is 22/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
40/10 = 40 × 21/10 × 21 = 840/210 - Add the two like fractions:
700/210 + 840/210 = 700 + 840/210 = 1540/210 - 1540/210 simplified gives 22/3
- So, 70/21 + 40/10 = 22/3
In mixed form: 71/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+80/10 70/42+40/10 70/21+40/20 70/63+40/10 70/21+40/30 70/21+40/50 70/21+40/70