Subtract 21/80 from 1/50
1/50 - 21/80 is -97/400.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 50 × 8 = 400,
1/50 = 1 × 8/50 × 8 = 8/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
21/80 = 21 × 5/80 × 5 = 105/400 - Subtract the two like fractions:
8/400 - 105/400 = 8 - 105/400 = -97/400
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/50-21/80 1/50-42/80 3/50-21/80 1/50-63/80 5/50-21/80 7/50-21/80