Subtract 6/81 from 30/28
1st number: 1 2/28, 2nd number: 6/81
30/28 - 6/81 is 377/378.
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,
30/28 = 30 × 81/28 × 81 = 2430/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
6/81 = 6 × 28/81 × 28 = 168/2268 - Subtract the two like fractions:
2430/2268 - 168/2268 = 2430 - 168/2268 = 2262/2268 - After reducing the fraction, the answer is 377/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-6/81 30/28-12/81 30/56-6/81 90/28-6/81 30/28-18/81 30/84-6/81 30/28-30/81 30/28-42/81