Subtract 9/12 from 25/45
25/45 - 9/12 is -7/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
25/45 = 25 × 4/45 × 4 = 100/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
9/12 = 9 × 15/12 × 15 = 135/180 - Subtract the two like fractions:
100/180 - 135/180 = 100 - 135/180 = -35/180 - After reducing the fraction, the answer is -7/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/45-9/12 25/45-18/12 25/90-9/12 25/45-9/24 75/45-9/12 25/45-27/12 25/45-9/36 25/45-45/12 25/45-9/60 25/45-63/12 25/45-9/84