Add 25/42 and 28/10, Solve 25/42 + 2 8/10 as a fraction

Add 25/42 and 28/10

1^st number: 25/42, 2^nd number: 2 8/10

25/42 + 28/10 is 713/210.

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,
25/42 = 25 × 5/42 × 5 = 125/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
28/10 = 28 × 21/10 × 21 = 588/210
Add the two like fractions:
125/210 + 588/210 = 125 + 588/210 = 713/210
So, 25/42 + 28/10 = 713/210
In mixed form: 383/210

MathStep (Works offline)

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