Subtract 14/81 from 9/40
9/40 - 14/81 is 169/3240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
9/40 = 9 × 81/40 × 81 = 729/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
14/81 = 14 × 40/81 × 40 = 560/3240 - Subtract the two like fractions:
729/3240 - 560/3240 = 729 - 560/3240 = 169/3240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-14/81 9/40-28/81 9/80-14/81 27/40-14/81 9/40-42/81 45/40-14/81 9/40-70/81 63/40-14/81 9/40-98/81