Subtract 4/81 from 12/16
12/16 - 4/81 is 227/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 81 is 1296
Next, find the equivalent fraction of both fractional numbers with denominator 1296 - For the 1st fraction, since 16 × 81 = 1296,
12/16 = 12 × 81/16 × 81 = 972/1296 - Likewise, for the 2nd fraction, since 81 × 16 = 1296,
4/81 = 4 × 16/81 × 16 = 64/1296 - Subtract the two like fractions:
972/1296 - 64/1296 = 972 - 64/1296 = 908/1296 - After reducing the fraction, the answer is 227/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/16-4/81 12/16-8/81 12/32-4/81 36/16-4/81 12/16-12/81 12/48-4/81 60/16-4/81 12/16-20/81 12/80-4/81 84/16-4/81 12/16-28/81