Subtract 7/81 from 12/4
1st number: 3 0/4, 2nd number: 7/81
12/4 - 7/81 is 236/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
12/4 = 12 × 81/4 × 81 = 972/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
7/81 = 7 × 4/81 × 4 = 28/324 - Subtract the two like fractions:
972/324 - 28/324 = 972 - 28/324 = 944/324 - After reducing the fraction, the answer is 236/81
- In mixed form: 274/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/4-7/81 12/4-14/81 12/8-7/81 36/4-7/81 12/4-21/81 60/4-7/81 12/4-35/81 12/20-7/81 84/4-7/81 12/4-49/81 12/28-7/81