Subtract 20/45 from 8/25
8/25 - 20/45 is -28/225.
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,
8/25 = 8 × 9/25 × 9 = 72/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
20/45 = 20 × 5/45 × 5 = 100/225 - Subtract the two like fractions:
72/225 - 100/225 = 72 - 100/225 = -28/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/25-20/45 8/25-40/45 8/50-20/45 8/25-20/90 24/25-20/45 8/25-60/45 8/75-20/45 40/25-20/45 56/25-20/45