Subtract 21/25 from 2/90
2/90 - 21/25 is -184/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 25 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
2/90 = 2 × 5/90 × 5 = 10/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
21/25 = 21 × 18/25 × 18 = 378/450 - Subtract the two like fractions:
10/450 - 378/450 = 10 - 378/450 = -368/450 - After reducing the fraction, the answer is -184/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90-21/25 2/90-42/25 2/90-21/50 6/90-21/25 2/90-63/25 2/90-21/75 10/90-21/25 14/90-21/25