Add 54/42 and 18/8
1st number: 1 12/42, 2nd number: 2 2/8
54/42 + 18/8 is 99/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
54/42 = 54 × 4/42 × 4 = 216/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
18/8 = 18 × 21/8 × 21 = 378/168 - Add the two like fractions:
216/168 + 378/168 = 216 + 378/168 = 594/168 - 594/168 simplified gives 99/28
- So, 54/42 + 18/8 = 99/28
In mixed form: 315/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+36/8 54/84+18/8 54/42+18/16 54/42+54/8 54/42+18/24 54/42+90/8 54/42+18/40 54/42+18/56