Add 54/8 and 42/7
1st number: 6 6/8, 2nd number: 6 0/7
54/8 + 42/7 is 51/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
54/8 = 54 × 7/8 × 7 = 378/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
42/7 = 42 × 8/7 × 8 = 336/56 - Add the two like fractions:
378/56 + 336/56 = 378 + 336/56 = 714/56 - 714/56 simplified gives 51/4
- So, 54/8 + 42/7 = 51/4
In mixed form: 123/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/8+84/7 54/16+42/7 54/8+42/14 54/24+42/7 54/8+42/21 54/40+42/7 54/8+42/35 54/56+42/7 54/8+42/49