Add 21/27 and 24/84
21/27 + 24/84 is 67/63.
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,
21/27 = 21 × 28/27 × 28 = 588/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
24/84 = 24 × 9/84 × 9 = 216/756 - Add the two like fractions:
588/756 + 216/756 = 588 + 216/756 = 804/756 - 804/756 simplified gives 67/63
- So, 21/27 + 24/84 = 67/63
In mixed form: 14/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27+24/84 21/27+48/84 21/54+24/84 63/27+24/84 21/27+72/84 21/81+24/84