Subtract 21/80 from 50/4
1st number: 12 2/4, 2nd number: 21/80
50/4 - 21/80 is 979/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
50/4 = 50 × 20/4 × 20 = 1000/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Subtract the two like fractions:
1000/80 - 21/80 = 1000 - 21/80 = 979/80 - In mixed form: 1219/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/4-42/80 50/8-21/80 50/4-63/80 50/12-21/80 50/20-21/80 50/28-21/80