Subtract 10/25 from 18/21
18/21 - 10/25 is 16/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
18/21 = 18 × 25/21 × 25 = 450/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
10/25 = 10 × 21/25 × 21 = 210/525 - Subtract the two like fractions:
450/525 - 210/525 = 450 - 210/525 = 240/525 - After reducing the fraction, the answer is 16/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21-10/25 18/21-20/25 18/42-10/25 18/21-10/50 54/21-10/25 18/21-30/25 18/63-10/25 18/21-10/75 90/21-10/25 18/21-50/25 18/21-70/25