Add 15/21 and 60/25, Solve 15/21 + 2 10/25 as a fraction

Add 15/21 and 60/25

1^st number: 15/21, 2^nd number: 2 10/25

15/21 + 60/25 is 109/35.

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

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 21 × 25 = 525,
15/21 = 15 × 25/21 × 25 = 375/525
Likewise, for the 2nd fraction, since 25 × 21 = 525,
60/25 = 60 × 21/25 × 21 = 1260/525
Add the two like fractions:
375/525 + 1260/525 = 375 + 1260/525 = 1635/525
1635/525 simplified gives 109/35
So, 15/21 + 60/25 = 109/35
In mixed form: 34/35

MathStep (Works offline)

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