Subtract 1/81 from 75/70
1st number: 1 5/70, 2nd number: 1/81
75/70 - 1/81 is 1201/1134.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
75/70 = 75 × 81/70 × 81 = 6075/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
1/81 = 1 × 70/81 × 70 = 70/5670 - Subtract the two like fractions:
6075/5670 - 70/5670 = 6075 - 70/5670 = 6005/5670 - After reducing the fraction, the answer is 1201/1134
- In mixed form: 167/1134
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/70-2/81 75/70-3/81 75/70-5/81 75/70-7/81