Subtract 1/18 from 27/40
27/40 - 1/18 is 223/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
27/40 = 27 × 9/40 × 9 = 243/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
1/18 = 1 × 20/18 × 20 = 20/360 - Subtract the two like fractions:
243/360 - 20/360 = 243 - 20/360 = 223/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/40-1/18 27/40-2/18 27/80-1/18 27/40-1/36 81/40-1/18 27/40-3/18 27/40-1/54 27/40-5/18 27/40-1/90 27/40-7/18