Add 42/84 and 4/54
42/84 + 4/54 is 31/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
42/84 = 42 × 9/84 × 9 = 378/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
4/54 = 4 × 14/54 × 14 = 56/756 - Add the two like fractions:
378/756 + 56/756 = 378 + 56/756 = 434/756 - 434/756 simplified gives 31/54
- So, 42/84 + 4/54 = 31/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+8/54 42/84+12/54 42/84+20/54 42/84+28/54