Subtract 1/81 from 30/20
1st number: 1 10/20, 2nd number: 1/81
30/20 - 1/81 is 241/162.
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,
30/20 = 30 × 81/20 × 81 = 2430/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
1/81 = 1 × 20/81 × 20 = 20/1620 - Subtract the two like fractions:
2430/1620 - 20/1620 = 2430 - 20/1620 = 2410/1620 - After reducing the fraction, the answer is 241/162
- In mixed form: 179/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20-1/81 30/20-2/81 30/40-1/81 90/20-1/81 30/20-3/81 30/60-1/81 30/20-5/81 30/20-7/81