Subtract 1/40 from 2/18
2/18 - 1/40 is 31/360.
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,
2/18 = 2 × 20/18 × 20 = 40/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
1/40 = 1 × 9/40 × 9 = 9/360 - Subtract the two like fractions:
40/360 - 9/360 = 40 - 9/360 = 31/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/18-1/40 2/18-2/40 2/36-1/40 2/18-1/80 6/18-1/40 2/18-3/40 2/54-1/40 10/18-1/40 2/18-5/40 2/90-1/40 14/18-1/40 2/18-7/40