Subtract 6/81 from 40/63
40/63 - 6/81 is 106/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
40/63 = 40 × 9/63 × 9 = 360/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
6/81 = 6 × 7/81 × 7 = 42/567 - Subtract the two like fractions:
360/567 - 42/567 = 360 - 42/567 = 318/567 - After reducing the fraction, the answer is 106/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/63-6/81 40/63-12/81 40/63-18/81 40/63-30/81 40/63-42/81