Add 12/27 and 5/42
12/27 + 5/42 is 71/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 27 × 14 = 378,
12/27 = 12 × 14/27 × 14 = 168/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
5/42 = 5 × 9/42 × 9 = 45/378 - Add the two like fractions:
168/378 + 45/378 = 168 + 45/378 = 213/378 - 213/378 simplified gives 71/126
- So, 12/27 + 5/42 = 71/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27+5/42 12/27+10/42 12/54+5/42 12/27+5/84 36/27+5/42 12/27+15/42 12/81+5/42 60/27+5/42 12/27+25/42 84/27+5/42 12/27+35/42