Subtract 21/6 from 81/4
1st number: 20 1/4, 2nd number: 3 3/6
81/4 - 21/6 is 67/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 6 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
81/4 = 81 × 3/4 × 3 = 243/12 - Likewise, for the 2nd fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Subtract the two like fractions:
243/12 - 42/12 = 243 - 42/12 = 201/12 - After reducing the fraction, the answer is 67/4
- In mixed form: 163/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4-42/6 81/8-21/6 81/4-21/12 81/4-63/6 81/12-21/6 81/4-21/18 81/20-21/6 81/4-21/30 81/28-21/6 81/4-21/42