Subtract 1/21 from 42/16
1st number: 2 10/16, 2nd number: 1/21
42/16 - 1/21 is 433/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
42/16 = 42 × 21/16 × 21 = 882/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
1/21 = 1 × 16/21 × 16 = 16/336 - Subtract the two like fractions:
882/336 - 16/336 = 882 - 16/336 = 866/336 - After reducing the fraction, the answer is 433/168
- In mixed form: 297/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/16-1/21 42/16-2/21 42/32-1/21 42/16-1/42 42/16-3/21 42/48-1/21 42/16-1/63 42/16-5/21 42/80-1/21 42/16-7/21