Subtract 9/14 from 18/40
18/40 - 9/14 is -27/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 14 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Likewise, for the 2nd fraction, since 14 × 20 = 280,
9/14 = 9 × 20/14 × 20 = 180/280 - Subtract the two like fractions:
126/280 - 180/280 = 126 - 180/280 = -54/280 - After reducing the fraction, the answer is -27/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40-9/14 18/40-18/14 18/80-9/14 18/40-9/28 54/40-9/14 18/40-27/14 18/40-9/42 90/40-9/14 18/40-45/14 18/40-9/70 18/40-63/14 18/40-9/98