Add 8/42 and 20/84
8/42 + 20/84 is 3/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
8/42 = 8 × 2/42 × 2 = 16/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Add the two like fractions:
16/84 + 20/84 = 16 + 20/84 = 36/84 - 36/84 simplified gives 3/7
- So, 8/42 + 20/84 = 3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+20/84 8/42+40/84 8/84+20/84 24/42+20/84 8/42+60/84 40/42+20/84 56/42+20/84