Subtract 25/16 from 1/21
1st number: 1/21, 2nd number: 1 9/16
1/21 - 25/16 is -509/336.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
1/21 = 1 × 16/21 × 16 = 16/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
25/16 = 25 × 21/16 × 21 = 525/336 - Subtract the two like fractions:
16/336 - 525/336 = 16 - 525/336 = -509/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-25/16 1/21-50/16 1/42-25/16 1/21-25/32 3/21-25/16 1/21-75/16 1/63-25/16 1/21-25/48 5/21-25/16 1/21-25/80 7/21-25/16