Subtract 80/9 from 45/25, Solve 1 20/25

Subtract 80/9 from 45/25

1^st number: 1 20/25, 2^nd number: 8 8/9

45/25 - 80/9 is -319/45.

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,
45/25 = 45 × 9/25 × 9 = 405/225
Likewise, for the 2nd fraction, since 9 × 25 = 225,
80/9 = 80 × 25/9 × 25 = 2000/225
Subtract the two like fractions:
405/225 - 2000/225 = 405 - 2000/225 = -1595/225
After reducing the fraction, the answer is -319/45

MathStep (Works offline)

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