Subtract 81/50 from 21/9
1st number: 2 3/9, 2nd number: 1 31/50
21/9 - 81/50 is 107/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 9 × 50 = 450,
21/9 = 21 × 50/9 × 50 = 1050/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
81/50 = 81 × 9/50 × 9 = 729/450 - Subtract the two like fractions:
1050/450 - 729/450 = 1050 - 729/450 = 321/450 - After reducing the fraction, the answer is 107/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9-81/50 21/18-81/50 63/9-81/50 21/27-81/50 21/45-81/50 21/63-81/50