Subtract 21/50 from 1/4
1/4 - 21/50 is -17/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 50 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 4 × 25 = 100,
1/4 = 1 × 25/4 × 25 = 25/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
21/50 = 21 × 2/50 × 2 = 42/100 - Subtract the two like fractions:
25/100 - 42/100 = 25 - 42/100 = -17/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/4-21/50 1/4-42/50 1/8-21/50 3/4-21/50 1/4-63/50 1/12-21/50 5/4-21/50 1/20-21/50 7/4-21/50 1/28-21/50