Subtract 80/81 from 49/4
1st number: 12 1/4, 2nd number: 80/81
49/4 - 80/81 is 3649/324.
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,
49/4 = 49 × 81/4 × 81 = 3969/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
80/81 = 80 × 4/81 × 4 = 320/324 - Subtract the two like fractions:
3969/324 - 320/324 = 3969 - 320/324 = 3649/324 - In mixed form: 1185/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/4-80/81 49/8-80/81 49/12-80/81 49/20-80/81 49/28-80/81