Add 8/84 and 12/42
8/84 + 12/42 is 8/21.
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,
12/42 = 12 × 2/42 × 2 = 24/84 - Add the two like fractions:
8/84 + 24/84 = 8 + 24/84 = 32/84 - 32/84 simplified gives 8/21
- So, 8/84 + 12/42 = 8/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84+12/42 8/84+24/42 8/84+12/84 24/84+12/42 8/84+36/42 40/84+12/42 8/84+60/42 56/84+12/42 8/84+84/42