Subtract 9/40 from 7/18
7/18 - 9/40 is 59/360.
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,
7/18 = 7 × 20/18 × 20 = 140/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Subtract the two like fractions:
140/360 - 81/360 = 140 - 81/360 = 59/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18-9/40 7/18-18/40 7/36-9/40 7/18-9/80 21/18-9/40 7/18-27/40 7/54-9/40 35/18-9/40 7/18-45/40 7/90-9/40 49/18-9/40 7/18-63/40