Add 12/21 and 25/18
1st number: 12/21, 2nd number: 1 7/18
12/21 + 25/18 is 247/126.
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,
12/21 = 12 × 6/21 × 6 = 72/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
25/18 = 25 × 7/18 × 7 = 175/126 - Add the two like fractions:
72/126 + 175/126 = 72 + 175/126 = 247/126 - So, 12/21 + 25/18 = 247/126
In mixed form: 1121/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+25/18 12/21+50/18 12/42+25/18 12/21+25/36 36/21+25/18 12/21+75/18 12/63+25/18 12/21+25/54 60/21+25/18 12/21+25/90 84/21+25/18