Subtract 20/81 from 70/5
1st number: 14 0/5, 2nd number: 20/81
70/5 - 20/81 is 1114/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
70/5 = 70 × 81/5 × 81 = 5670/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
20/81 = 20 × 5/81 × 5 = 100/405 - Subtract the two like fractions:
5670/405 - 100/405 = 5670 - 100/405 = 5570/405 - After reducing the fraction, the answer is 1114/81
- In mixed form: 1361/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/5-40/81 70/10-20/81 70/5-60/81 70/15-20/81 70/25-20/81 70/35-20/81