Add 27/42 and 42/70
27/42 + 42/70 is 87/70.
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,
27/42 = 27 × 5/42 × 5 = 135/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
42/70 = 42 × 3/70 × 3 = 126/210 - Add the two like fractions:
135/210 + 126/210 = 135 + 126/210 = 261/210 - 261/210 simplified gives 87/70
- So, 27/42 + 42/70 = 87/70
In mixed form: 117/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+42/70 27/42+84/70 27/84+42/70 81/42+42/70