Subtract 90/81 from 9/50
1st number: 9/50, 2nd number: 1 9/81
9/50 - 90/81 is -419/450.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 81 is 4050
Next, find the equivalent fraction of both fractional numbers with denominator 4050 - For the 1st fraction, since 50 × 81 = 4050,
9/50 = 9 × 81/50 × 81 = 729/4050 - Likewise, for the 2nd fraction, since 81 × 50 = 4050,
90/81 = 90 × 50/81 × 50 = 4500/4050 - Subtract the two like fractions:
729/4050 - 4500/4050 = 729 - 4500/4050 = -3771/4050 - After reducing the fraction, the answer is -419/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/50-90/81 27/50-90/81 45/50-90/81 63/50-90/81