Subtract 90/81 from 16/75
1st number: 16/75, 2nd number: 1 9/81
16/75 - 90/81 is -202/225.
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,
16/75 = 16 × 27/75 × 27 = 432/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
90/81 = 90 × 25/81 × 25 = 2250/2025 - Subtract the two like fractions:
432/2025 - 2250/2025 = 432 - 2250/2025 = -1818/2025 - After reducing the fraction, the answer is -202/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/75-90/81 48/75-90/81 80/75-90/81