Add 12/54 and 28/42
12/54 + 28/42 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
12/54 = 12 × 7/54 × 7 = 84/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
28/42 = 28 × 9/42 × 9 = 252/378 - Add the two like fractions:
84/378 + 252/378 = 84 + 252/378 = 336/378 - 336/378 simplified gives 8/9
- So, 12/54 + 28/42 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/54+28/42 12/54+56/42 12/54+28/84 36/54+28/42 12/54+84/42 60/54+28/42 84/54+28/42