Subtract 4/81 from 9/28
9/28 - 4/81 is 617/2268.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 28 × 81 = 2268,
9/28 = 9 × 81/28 × 81 = 729/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
4/81 = 4 × 28/81 × 28 = 112/2268 - Subtract the two like fractions:
729/2268 - 112/2268 = 729 - 112/2268 = 617/2268
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-4/81 9/28-8/81 9/56-4/81 27/28-4/81 9/28-12/81 9/84-4/81 45/28-4/81 9/28-20/81 63/28-4/81 9/28-28/81