Subtract 21/54 from 42/16
1st number: 2 10/16, 2nd number: 21/54
42/16 - 21/54 is 161/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 54 is 432
Next, find the equivalent fraction of both fractional numbers with denominator 432 - For the 1st fraction, since 16 × 27 = 432,
42/16 = 42 × 27/16 × 27 = 1134/432 - Likewise, for the 2nd fraction, since 54 × 8 = 432,
21/54 = 21 × 8/54 × 8 = 168/432 - Subtract the two like fractions:
1134/432 - 168/432 = 1134 - 168/432 = 966/432 - After reducing the fraction, the answer is 161/72
- In mixed form: 217/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/16-21/54 42/16-42/54 42/32-21/54 42/16-63/54 42/48-21/54 42/80-21/54