Subtract 21/18 from 10/75
1st number: 10/75, 2nd number: 1 3/18
10/75 - 21/18 is -31/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
10/75 = 10 × 6/75 × 6 = 60/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450 - Subtract the two like fractions:
60/450 - 525/450 = 60 - 525/450 = -465/450 - After reducing the fraction, the answer is -31/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/75-21/18 10/75-42/18 10/75-21/36 30/75-21/18 10/75-63/18 10/75-21/54 50/75-21/18 10/75-21/90 70/75-21/18