Add 42/25 and 15/9, Solve 1 17/25 + 1 6/9 as a fraction

Add 42/25 and 15/9

1^st number: 1 17/25, 2^nd number: 1 6/9

42/25 + 15/9 is 251/75.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 9 is 225

Next, find the equivalent fraction of both fractional numbers with denominator 225
For the 1st fraction, since 25 × 9 = 225,
42/25 = 42 × 9/25 × 9 = 378/225
Likewise, for the 2nd fraction, since 9 × 25 = 225,
15/9 = 15 × 25/9 × 25 = 375/225
Add the two like fractions:
378/225 + 375/225 = 378 + 375/225 = 753/225
753/225 simplified gives 251/75
So, 42/25 + 15/9 = 251/75
In mixed form: 326/75

MathStep (Works offline)

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