Add 90/3 and 60/21
1st number: 30 0/3, 2nd number: 2 18/21
90/3 + 60/21 is 230/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
90/3 = 90 × 7/3 × 7 = 630/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
60/21 = 60 × 1/21 × 1 = 60/21 - Add the two like fractions:
630/21 + 60/21 = 630 + 60/21 = 690/21 - 690/21 simplified gives 230/7
- So, 90/3 + 60/21 = 230/7
In mixed form: 326/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6+60/21 90/3+60/42 90/9+60/21 90/3+60/63 90/15+60/21 90/21+60/21