Subtract 35/81 from 28/20
1st number: 1 8/20, 2nd number: 35/81
28/20 - 35/81 is 392/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
28/20 = 28 × 81/20 × 81 = 2268/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
35/81 = 35 × 20/81 × 20 = 700/1620 - Subtract the two like fractions:
2268/1620 - 700/1620 = 2268 - 700/1620 = 1568/1620 - After reducing the fraction, the answer is 392/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-35/81 28/20-70/81 28/40-35/81 84/20-35/81 28/60-35/81