Add 84/42 and 7/5, Solve 2 0/42 + 1 2/5 as a fraction

Add 84/42 and 7/5

1^st number: 2 0/42, 2^nd number: 1 2/5

84/42 + 7/5 is 17/5.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210
Likewise, for the 2nd fraction, since 5 × 42 = 210,
7/5 = 7 × 42/5 × 42 = 294/210
Add the two like fractions:
420/210 + 294/210 = 420 + 294/210 = 714/210
714/210 simplified gives 17/5
So, 84/42 + 7/5 = 17/5
In mixed form: 32/5

MathStep (Works offline)

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