Subtract 20/18 from 12/25
1st number: 12/25, 2nd number: 1 2/18
12/25 - 20/18 is -142/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
12/25 = 12 × 18/25 × 18 = 216/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
20/18 = 20 × 25/18 × 25 = 500/450 - Subtract the two like fractions:
216/450 - 500/450 = 216 - 500/450 = -284/450 - After reducing the fraction, the answer is -142/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/25-20/18 12/25-40/18 12/50-20/18 12/25-20/36 36/25-20/18 12/25-60/18 12/75-20/18 12/25-20/54 60/25-20/18 12/25-20/90 84/25-20/18