Subtract 9/8 from 30/50
1st number: 30/50, 2nd number: 1 1/8
30/50 - 9/8 is -21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 8 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 50 × 4 = 200,
30/50 = 30 × 4/50 × 4 = 120/200 - Likewise, for the 2nd fraction, since 8 × 25 = 200,
9/8 = 9 × 25/8 × 25 = 225/200 - Subtract the two like fractions:
120/200 - 225/200 = 120 - 225/200 = -105/200 - After reducing the fraction, the answer is -21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/50-9/8 30/50-18/8 30/50-9/16 90/50-9/8 30/50-27/8 30/50-9/24 30/50-45/8 30/50-9/40 30/50-63/8 30/50-9/56