Subtract 45/40 from 9/28
1st number: 9/28, 2nd number: 1 5/40
9/28 - 45/40 is -45/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
9/28 = 9 × 10/28 × 10 = 90/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
45/40 = 45 × 7/40 × 7 = 315/280 - Subtract the two like fractions:
90/280 - 315/280 = 90 - 315/280 = -225/280 - After reducing the fraction, the answer is -45/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-45/40 9/28-90/40 9/56-45/40 9/28-45/80 27/28-45/40 9/84-45/40 45/28-45/40 63/28-45/40