Subtract 12/20 from 18/75
18/75 - 12/20 is -9/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 20 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 75 × 4 = 300,
18/75 = 18 × 4/75 × 4 = 72/300 - Likewise, for the 2nd fraction, since 20 × 15 = 300,
12/20 = 12 × 15/20 × 15 = 180/300 - Subtract the two like fractions:
72/300 - 180/300 = 72 - 180/300 = -108/300 - After reducing the fraction, the answer is -9/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/75-12/20 18/75-24/20 18/75-12/40 54/75-12/20 18/75-36/20 18/75-12/60 90/75-12/20 18/75-60/20 18/75-84/20