Subtract 75/16 from 21/5
1st number: 4 1/5, 2nd number: 4 11/16
21/5 - 75/16 is -39/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 16 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 16 × 5 = 80,
75/16 = 75 × 5/16 × 5 = 375/80 - Subtract the two like fractions:
336/80 - 375/80 = 336 - 375/80 = -39/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-75/16 21/10-75/16 21/5-75/32 63/5-75/16 21/15-75/16 21/5-75/48 21/25-75/16 21/5-75/80 21/35-75/16