Subtract 30/81 from 40/75
40/75 - 30/81 is 22/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 81 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 75 × 27 = 2025,
40/75 = 40 × 27/75 × 27 = 1080/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
30/81 = 30 × 25/81 × 25 = 750/2025 - Subtract the two like fractions:
1080/2025 - 750/2025 = 1080 - 750/2025 = 330/2025 - After reducing the fraction, the answer is 22/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/75-30/81 40/75-60/81 40/75-90/81