Subtract 7/25 from 21/18
1st number: 1 3/18, 2nd number: 7/25
21/18 - 7/25 is 133/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 25 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
7/25 = 7 × 18/25 × 18 = 126/450 - Subtract the two like fractions:
525/450 - 126/450 = 525 - 126/450 = 399/450 - After reducing the fraction, the answer is 133/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18-7/25 21/18-14/25 21/36-7/25 21/18-7/50 63/18-7/25 21/18-21/25 21/54-7/25 21/18-7/75 21/18-35/25 21/90-7/25 21/18-49/25