Add 27/42 and 80/70, Solve 27/42 + 1 10/70 as a fraction

Add 27/42 and 80/70

1^st number: 27/42, 2^nd number: 1 10/70

27/42 + 80/70 is 25/14.

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,
80/70 = 80 × 3/70 × 3 = 240/210
Add the two like fractions:
135/210 + 240/210 = 135 + 240/210 = 375/210
375/210 simplified gives 25/14
So, 27/42 + 80/70 = 25/14
In mixed form: 111/14

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad