Subtract 21/80 from 4/25
4/25 - 21/80 is -41/400.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 25 × 16 = 400,
4/25 = 4 × 16/25 × 16 = 64/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
21/80 = 21 × 5/80 × 5 = 105/400 - Subtract the two like fractions:
64/400 - 105/400 = 64 - 105/400 = -41/400
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/25-21/80 4/25-42/80 4/50-21/80 12/25-21/80 4/25-63/80 4/75-21/80 20/25-21/80 28/25-21/80