Subtract 3/81 from 30/35
30/35 - 3/81 is 155/189.
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,
30/35 = 30 × 81/35 × 81 = 2430/2835 - Likewise, for the 2nd fraction, since 81 × 35 = 2835,
3/81 = 3 × 35/81 × 35 = 105/2835 - Subtract the two like fractions:
2430/2835 - 105/2835 = 2430 - 105/2835 = 2325/2835 - After reducing the fraction, the answer is 155/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/35-3/81 30/35-6/81 30/70-3/81 90/35-3/81 30/35-9/81 30/35-15/81 30/35-21/81