Add 60/21 and 90/70
1st number: 2 18/21, 2nd number: 1 20/70
60/21 + 90/70 is 29/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
60/21 = 60 × 10/21 × 10 = 600/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210 - Add the two like fractions:
600/210 + 270/210 = 600 + 270/210 = 870/210 - 870/210 simplified gives 29/7
- So, 60/21 + 90/70 = 29/7
In mixed form: 41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+90/70 60/63+90/70