Subtract 16/4 from 3/21
1st number: 3/21, 2nd number: 4 0/4
3/21 - 16/4 is -27/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
3/21 = 3 × 4/21 × 4 = 12/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
16/4 = 16 × 21/4 × 21 = 336/84 - Subtract the two like fractions:
12/84 - 336/84 = 12 - 336/84 = -324/84 - After reducing the fraction, the answer is -27/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21-16/4 3/21-32/4 3/42-16/4 3/21-16/8 9/21-16/4 3/21-48/4 3/63-16/4 3/21-16/12 15/21-16/4 3/21-80/4 3/21-16/20 3/21-16/28