Add 3/12 and 5/42
3/12 + 5/42 is 31/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
3/12 = 3 × 7/12 × 7 = 21/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
5/42 = 5 × 2/42 × 2 = 10/84 - Add the two like fractions:
21/84 + 10/84 = 21 + 10/84 = 31/84 - So, 3/12 + 5/42 = 31/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+5/42 3/12+10/42 3/24+5/42 3/12+5/84 9/12+5/42 3/12+15/42 3/36+5/42 15/12+5/42 3/12+25/42 3/60+5/42 21/12+5/42 3/12+35/42 3/84+5/42