Add 12/35 and 49/42, Solve 12/35 + 1 7/42 as a fraction

Add 12/35 and 49/42

1^st number: 12/35, 2^nd number: 1 7/42

12/35 + 49/42 is 317/210.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 35 × 6 = 210,
12/35 = 12 × 6/35 × 6 = 72/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
49/42 = 49 × 5/42 × 5 = 245/210
Add the two like fractions:
72/210 + 245/210 = 72 + 245/210 = 317/210
So, 12/35 + 49/42 = 317/210
In mixed form: 1107/210

MathStep (Works offline)

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