Subtract 45/40 from 4/18
1st number: 4/18, 2nd number: 1 5/40
4/18 - 45/40 is -65/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
4/18 = 4 × 20/18 × 20 = 80/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360 - Subtract the two like fractions:
80/360 - 405/360 = 80 - 405/360 = -325/360 - After reducing the fraction, the answer is -65/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18-45/40 4/18-90/40 4/36-45/40 4/18-45/80 12/18-45/40 4/54-45/40 20/18-45/40 4/90-45/40 28/18-45/40