Subtract 81/50 from 7/9
1st number: 7/9, 2nd number: 1 31/50
7/9 - 81/50 is -379/450.
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,
7/9 = 7 × 50/9 × 50 = 350/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
81/50 = 81 × 9/50 × 9 = 729/450 - Subtract the two like fractions:
350/450 - 729/450 = 350 - 729/450 = -379/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9-81/50 7/18-81/50 21/9-81/50 7/27-81/50 35/9-81/50 7/45-81/50 49/9-81/50 7/63-81/50