Add 54/42 and 12/70
1st number: 1 12/42, 2nd number: 12/70
54/42 + 12/70 is 51/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 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 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Add the two like fractions:
270/210 + 36/210 = 270 + 36/210 = 306/210 - 306/210 simplified gives 51/35
- So, 54/42 + 12/70 = 51/35
In mixed form: 116/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+24/70 54/84+12/70 54/42+36/70 54/42+60/70 54/42+84/70