Subtract 21/18 from 8/25
1st number: 8/25, 2nd number: 1 3/18
8/25 - 21/18 is -127/150.
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,
8/25 = 8 × 18/25 × 18 = 144/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450 - Subtract the two like fractions:
144/450 - 525/450 = 144 - 525/450 = -381/450 - After reducing the fraction, the answer is -127/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/25-21/18 8/25-42/18 8/50-21/18 8/25-21/36 24/25-21/18 8/25-63/18 8/75-21/18 8/25-21/54 40/25-21/18 8/25-21/90 56/25-21/18