Add 12/21 and 18/24
12/21 + 18/24 is 37/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
12/21 = 12 × 8/21 × 8 = 96/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
18/24 = 18 × 7/24 × 7 = 126/168 - Add the two like fractions:
96/168 + 126/168 = 96 + 126/168 = 222/168 - 222/168 simplified gives 37/28
- So, 12/21 + 18/24 = 37/28
In mixed form: 19/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+18/24 12/21+36/24 12/42+18/24 12/21+18/48 36/21+18/24 12/21+54/24 12/63+18/24 12/21+18/72 60/21+18/24 12/21+90/24 84/21+18/24