Subtract 20/3 from 81/4
1st number: 20 1/4, 2nd number: 6 2/3
81/4 - 20/3 is 163/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 3 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 3 × 4 = 12,
20/3 = 20 × 4/3 × 4 = 80/12 - Subtract the two like fractions:
243/12 - 80/12 = 243 - 80/12 = 163/12 - In mixed form: 137/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4-40/3 81/8-20/3 81/4-20/6 81/4-60/3 81/12-20/3 81/4-20/9 81/20-20/3 81/4-20/15 81/28-20/3 81/4-20/21