Subtract 8/21 from 6/4
1st number: 1 2/4, 2nd number: 8/21
6/4 - 8/21 is 47/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
6/4 = 6 × 21/4 × 21 = 126/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
8/21 = 8 × 4/21 × 4 = 32/84 - Subtract the two like fractions:
126/84 - 32/84 = 126 - 32/84 = 94/84 - After reducing the fraction, the answer is 47/42
- In mixed form: 15/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/4-8/21 6/4-16/21 6/8-8/21 6/4-8/42 18/4-8/21 6/4-24/21 6/12-8/21 6/4-8/63 30/4-8/21 6/4-40/21 6/20-8/21 42/4-8/21 6/4-56/21 6/28-8/21