Subtract 30/45 from 12/36
12/36 - 30/45 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
12/36 = 12 × 5/36 × 5 = 60/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
30/45 = 30 × 4/45 × 4 = 120/180 - Subtract the two like fractions:
60/180 - 120/180 = 60 - 120/180 = -60/180 - After reducing the fraction, the answer is -1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/36-30/45 12/36-60/45 12/72-30/45 12/36-30/90 12/36-90/45 60/36-30/45 84/36-30/45