Add 84/42 and 4/10, Solve 2 0/42 + 4/10 as a fraction

Add 84/42 and 4/10

1^st number: 2 0/42, 2^nd number: 4/10

84/42 + 4/10 is 12/5.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 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 10 × 21 = 210,
4/10 = 4 × 21/10 × 21 = 84/210
Add the two like fractions:
420/210 + 84/210 = 420 + 84/210 = 504/210
504/210 simplified gives 12/5
So, 84/42 + 4/10 = 12/5
In mixed form: 22/5

MathStep (Works offline)

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