Subtract 25/80 from 21/5
1st number: 4 1/5, 2nd number: 25/80
21/5 - 25/80 is 311/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
21/5 = 21 × 16/5 × 16 = 336/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
25/80 = 25 × 1/80 × 1 = 25/80 - Subtract the two like fractions:
336/80 - 25/80 = 336 - 25/80 = 311/80 - In mixed form: 371/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-25/80 21/5-50/80 21/10-25/80 63/5-25/80 21/5-75/80 21/15-25/80 21/25-25/80 21/35-25/80