Subtract 70/81 from 50/15
1st number: 3 5/15, 2nd number: 70/81
50/15 - 70/81 is 200/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
50/15 = 50 × 27/15 × 27 = 1350/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
70/81 = 70 × 5/81 × 5 = 350/405 - Subtract the two like fractions:
1350/405 - 350/405 = 1350 - 350/405 = 1000/405 - After reducing the fraction, the answer is 200/81
- In mixed form: 238/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/30-70/81 50/45-70/81 50/75-70/81