Add 21/12 and 18/25
1st number: 1 9/12, 2nd number: 18/25
21/12 + 18/25 is 247/100.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
21/12 = 21 × 25/12 × 25 = 525/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
18/25 = 18 × 12/25 × 12 = 216/300 - Add the two like fractions:
525/300 + 216/300 = 525 + 216/300 = 741/300 - 741/300 simplified gives 247/100
- So, 21/12 + 18/25 = 247/100
In mixed form: 247/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+18/25 21/12+36/25 21/24+18/25 21/12+18/50 63/12+18/25 21/12+54/25 21/36+18/25 21/12+18/75 21/12+90/25 21/60+18/25 21/84+18/25