Subtract 45/20 from 9/40
1st number: 9/40, 2nd number: 2 5/20
9/40 - 45/20 is -81/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
9/40 = 9 × 1/40 × 1 = 9/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
45/20 = 45 × 2/20 × 2 = 90/40 - Subtract the two like fractions:
9/40 - 90/40 = 9 - 90/40 = -81/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-45/20 9/40-90/20 9/80-45/20 9/40-45/40 27/40-45/20 9/40-45/60 45/40-45/20 63/40-45/20