Add 9/72 and 42/25, Solve 9/72 + 1 17/25 as a fraction

Add 9/72 and 42/25

1^st number: 9/72, 2^nd number: 1 17/25

9/72 + 42/25 is 361/200.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 25 is 1800

Next, find the equivalent fraction of both fractional numbers with denominator 1800
For the 1st fraction, since 72 × 25 = 1800,
9/72 = 9 × 25/72 × 25 = 225/1800
Likewise, for the 2nd fraction, since 25 × 72 = 1800,
42/25 = 42 × 72/25 × 72 = 3024/1800
Add the two like fractions:
225/1800 + 3024/1800 = 225 + 3024/1800 = 3249/1800
3249/1800 simplified gives 361/200
So, 9/72 + 42/25 = 361/200
In mixed form: 1161/200

MathStep (Works offline)

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