Subtract 3/81 from 25/42
25/42 - 3/81 is 211/378.
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,
25/42 = 25 × 27/42 × 27 = 675/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
3/81 = 3 × 14/81 × 14 = 42/1134 - Subtract the two like fractions:
675/1134 - 42/1134 = 675 - 42/1134 = 633/1134 - After reducing the fraction, the answer is 211/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-3/81 25/42-6/81 25/84-3/81 75/42-3/81 25/42-9/81 25/42-15/81 25/42-21/81