Add 8/42 and 12/54
8/42 + 12/54 is 26/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
8/42 = 8 × 9/42 × 9 = 72/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
12/54 = 12 × 7/54 × 7 = 84/378 - Add the two like fractions:
72/378 + 84/378 = 72 + 84/378 = 156/378 - 156/378 simplified gives 26/63
- So, 8/42 + 12/54 = 26/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+12/54 8/42+24/54 8/84+12/54 24/42+12/54 8/42+36/54 40/42+12/54 8/42+60/54 56/42+12/54 8/42+84/54