Subtract 30/9 from 80/25, Solve 3 5/25

Subtract 30/9 from 80/25

1^st number: 3 5/25, 2^nd number: 3 3/9

80/25 - 30/9 is -2/15.

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,
80/25 = 80 × 9/25 × 9 = 720/225
Likewise, for the 2nd fraction, since 9 × 25 = 225,
30/9 = 30 × 25/9 × 25 = 750/225
Subtract the two like fractions:
720/225 - 750/225 = 720 - 750/225 = -30/225
After reducing the fraction, the answer is -2/15

MathStep (Works offline)

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