Subtract 20/50 from 21/48
21/48 - 20/50 is 3/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 50 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 48 × 25 = 1200,
21/48 = 21 × 25/48 × 25 = 525/1200 - Likewise, for the 2nd fraction, since 50 × 24 = 1200,
20/50 = 20 × 24/50 × 24 = 480/1200 - Subtract the two like fractions:
525/1200 - 480/1200 = 525 - 480/1200 = 45/1200 - After reducing the fraction, the answer is 3/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/48-20/50 21/48-40/50 21/96-20/50 63/48-20/50 21/48-60/50