Add 56/84 and 12/42
56/84 + 12/42 is 20/21.
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,
56/84 = 56 × 1/84 × 1 = 56/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
12/42 = 12 × 2/42 × 2 = 24/84 - Add the two like fractions:
56/84 + 24/84 = 56 + 24/84 = 80/84 - 80/84 simplified gives 20/21
- So, 56/84 + 12/42 = 20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+24/42 56/84+12/84 56/84+36/42 56/84+60/42 56/84+84/42