Subtract 18/40 from 1/9
1/9 - 18/40 is -61/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
1/9 = 1 × 40/9 × 40 = 40/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
18/40 = 18 × 9/40 × 9 = 162/360 - Subtract the two like fractions:
40/360 - 162/360 = 40 - 162/360 = -122/360 - After reducing the fraction, the answer is -61/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/9-18/40 1/9-36/40 1/18-18/40 1/9-18/80 3/9-18/40 1/9-54/40 1/27-18/40 5/9-18/40 1/9-90/40 1/45-18/40 7/9-18/40 1/63-18/40