Add 3/25 and 30/21, Solve 3/25 + 1 9/21 as a fraction

Add 3/25 and 30/21

1^st number: 3/25, 2^nd number: 1 9/21

3/25 + 30/21 is 271/175.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 25 × 21 = 525,
3/25 = 3 × 21/25 × 21 = 63/525
Likewise, for the 2nd fraction, since 21 × 25 = 525,
30/21 = 30 × 25/21 × 25 = 750/525
Add the two like fractions:
63/525 + 750/525 = 63 + 750/525 = 813/525
813/525 simplified gives 271/175
So, 3/25 + 30/21 = 271/175
In mixed form: 196/175

MathStep (Works offline)

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