Add 3/9 and 4/42
3/9 + 4/42 is 3/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
3/9 = 3 × 14/9 × 14 = 42/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
4/42 = 4 × 3/42 × 3 = 12/126 - Add the two like fractions:
42/126 + 12/126 = 42 + 12/126 = 54/126 - 54/126 simplified gives 3/7
- So, 3/9 + 4/42 = 3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/9+4/42 3/9+8/42 3/18+4/42 3/9+4/84 3/9+12/42 3/27+4/42 15/9+4/42 3/9+20/42 3/45+4/42 21/9+4/42 3/9+28/42 3/63+4/42