Add 64/21 and 1/25, Solve 3 1/21 + 1/25 as a fraction

Add 64/21 and 1/25

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

64/21 + 1/25 is 1621/525.

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,
64/21 = 64 × 25/21 × 25 = 1600/525
Likewise, for the 2nd fraction, since 25 × 21 = 525,
1/25 = 1 × 21/25 × 21 = 21/525
Add the two like fractions:
1600/525 + 21/525 = 1600 + 21/525 = 1621/525
So, 64/21 + 1/25 = 1621/525
In mixed form: 346/525

MathStep (Works offline)

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