Subtract 42/81 from 27/35
27/35 - 42/81 is 239/945.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 81 is 2835
Next, find the equivalent fraction of both fractional numbers with denominator 2835 - For the 1st fraction, since 35 × 81 = 2835,
27/35 = 27 × 81/35 × 81 = 2187/2835 - Likewise, for the 2nd fraction, since 81 × 35 = 2835,
42/81 = 42 × 35/81 × 35 = 1470/2835 - Subtract the two like fractions:
2187/2835 - 1470/2835 = 2187 - 1470/2835 = 717/2835 - After reducing the fraction, the answer is 239/945
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/35-42/81 27/35-84/81 27/70-42/81 81/35-42/81