Add 54/42 and 12/5
1st number: 1 12/42, 2nd number: 2 2/5
54/42 + 12/5 is 129/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
54/42 = 54 × 5/42 × 5 = 270/210 - Likewise, for the 2nd fraction, since 5 × 42 = 210,
12/5 = 12 × 42/5 × 42 = 504/210 - Add the two like fractions:
270/210 + 504/210 = 270 + 504/210 = 774/210 - 774/210 simplified gives 129/35
- So, 54/42 + 12/5 = 129/35
In mixed form: 324/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+24/5 54/84+12/5 54/42+12/10 54/42+36/5 54/42+12/15 54/42+60/5 54/42+12/25 54/42+84/5 54/42+12/35