Subtract 25/4 from 20/45
1st number: 20/45, 2nd number: 6 1/4
20/45 - 25/4 is -209/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
25/4 = 25 × 45/4 × 45 = 1125/180 - Subtract the two like fractions:
80/180 - 1125/180 = 80 - 1125/180 = -1045/180 - After reducing the fraction, the answer is -209/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45-25/4 20/45-50/4 20/90-25/4 20/45-25/8 60/45-25/4 20/45-75/4 20/45-25/12 20/45-25/20 20/45-25/28