Subtract 3/81 from 32/42
32/42 - 3/81 is 137/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
32/42 = 32 × 27/42 × 27 = 864/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
3/81 = 3 × 14/81 × 14 = 42/1134 - Subtract the two like fractions:
864/1134 - 42/1134 = 864 - 42/1134 = 822/1134 - After reducing the fraction, the answer is 137/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/42-3/81 32/42-6/81 32/84-3/81 96/42-3/81 32/42-9/81 32/42-15/81 32/42-21/81