Add 12/27 and 21/84
12/27 + 21/84 is 25/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
12/27 = 12 × 28/27 × 28 = 336/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
21/84 = 21 × 9/84 × 9 = 189/756 - Add the two like fractions:
336/756 + 189/756 = 336 + 189/756 = 525/756 - 525/756 simplified gives 25/36
- So, 12/27 + 21/84 = 25/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27+21/84 12/27+42/84 12/54+21/84 36/27+21/84 12/27+63/84 12/81+21/84 60/27+21/84 84/27+21/84