Add 42/54 and 56/7
1st number: 42/54, 2nd number: 8 0/7
42/54 + 56/7 is 79/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
42/54 = 42 × 7/54 × 7 = 294/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
56/7 = 56 × 54/7 × 54 = 3024/378 - Add the two like fractions:
294/378 + 3024/378 = 294 + 3024/378 = 3318/378 - 3318/378 simplified gives 79/9
- So, 42/54 + 56/7 = 79/9
In mixed form: 87/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/54+56/7 42/54+56/14 42/54+56/21 42/54+56/35 42/54+56/49