Add 30/21 and 24/18
1st number: 1 9/21, 2nd number: 1 6/18
30/21 + 24/18 is 58/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
30/21 = 30 × 6/21 × 6 = 180/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
24/18 = 24 × 7/18 × 7 = 168/126 - Add the two like fractions:
180/126 + 168/126 = 180 + 168/126 = 348/126 - 348/126 simplified gives 58/21
- So, 30/21 + 24/18 = 58/21
In mixed form: 216/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+24/18 30/21+48/18 30/42+24/18 30/21+24/36 90/21+24/18 30/21+72/18 30/63+24/18 30/21+24/54 30/21+24/90