Subtract 3/6 from 16/81
16/81 - 3/6 is -49/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 6 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
16/81 = 16 × 2/81 × 2 = 32/162 - Likewise, for the 2nd fraction, since 6 × 27 = 162,
3/6 = 3 × 27/6 × 27 = 81/162 - Subtract the two like fractions:
32/162 - 81/162 = 32 - 81/162 = -49/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/81-3/6 16/81-3/12 48/81-3/6 16/81-9/6 16/81-3/18 80/81-3/6 16/81-15/6 16/81-3/30 16/81-21/6 16/81-3/42