Subtract 20/42 from 30/16
1st number: 1 14/16, 2nd number: 20/42
30/16 - 20/42 is 235/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 42 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
30/16 = 30 × 21/16 × 21 = 630/336 - Likewise, for the 2nd fraction, since 42 × 8 = 336,
20/42 = 20 × 8/42 × 8 = 160/336 - Subtract the two like fractions:
630/336 - 160/336 = 630 - 160/336 = 470/336 - After reducing the fraction, the answer is 235/168
- In mixed form: 167/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/16-20/42 30/16-40/42 30/32-20/42 30/16-20/84 90/16-20/42 30/16-60/42 30/48-20/42 30/80-20/42