Add 8/84 and 18/42
8/84 + 18/42 is 11/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
8/84 = 8 × 1/84 × 1 = 8/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
18/42 = 18 × 2/42 × 2 = 36/84 - Add the two like fractions:
8/84 + 36/84 = 8 + 36/84 = 44/84 - 44/84 simplified gives 11/21
- So, 8/84 + 18/42 = 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84+18/42 8/84+36/42 8/84+18/84 24/84+18/42 8/84+54/42 40/84+18/42 8/84+90/42 56/84+18/42