Subtract 90/45 from 45/25
1st number: 1 20/25, 2nd number: 2 0/45
45/25 - 90/45 is -1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 45 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 45 × 5 = 225,
90/45 = 90 × 5/45 × 5 = 450/225 - Subtract the two like fractions:
405/225 - 450/225 = 405 - 450/225 = -45/225 - After reducing the fraction, the answer is -1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/25-90/45 45/50-90/45 45/75-90/45