Add 20/27 and 42/84
20/27 + 42/84 is 67/54.
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,
20/27 = 20 × 28/27 × 28 = 560/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
42/84 = 42 × 9/84 × 9 = 378/756 - Add the two like fractions:
560/756 + 378/756 = 560 + 378/756 = 938/756 - 938/756 simplified gives 67/54
- So, 20/27 + 42/84 = 67/54
In mixed form: 113/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27+42/84 20/54+42/84 60/27+42/84 20/81+42/84