Subtract 25/30 from 12/18
12/18 - 25/30 is -1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
25/30 = 25 × 3/30 × 3 = 75/90 - Subtract the two like fractions:
60/90 - 75/90 = 60 - 75/90 = -15/90 - After reducing the fraction, the answer is -1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18-25/30 12/18-50/30 12/36-25/30 12/18-25/60 36/18-25/30 12/18-75/30 12/54-25/30 12/18-25/90 60/18-25/30 12/90-25/30 84/18-25/30