Add 42/70 and 54/42
1st number: 42/70, 2nd number: 1 12/42
42/70 + 54/42 is 66/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
42/70 = 42 × 3/70 × 3 = 126/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
54/42 = 54 × 5/42 × 5 = 270/210 - Add the two like fractions:
126/210 + 270/210 = 126 + 270/210 = 396/210 - 396/210 simplified gives 66/35
- So, 42/70 + 54/42 = 66/35
In mixed form: 131/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+54/42 42/70+54/84