Add 20/84 and 42/27
1st number: 20/84, 2nd number: 1 15/27
20/84 + 42/27 is 113/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
20/84 = 20 × 9/84 × 9 = 180/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
42/27 = 42 × 28/27 × 28 = 1176/756 - Add the two like fractions:
180/756 + 1176/756 = 180 + 1176/756 = 1356/756 - 1356/756 simplified gives 113/63
- So, 20/84 + 42/27 = 113/63
In mixed form: 150/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+42/27 20/84+84/27 20/84+42/54 60/84+42/27 20/84+42/81