Subtract 15/81 from 70/7
1st number: 10 0/7, 2nd number: 15/81
70/7 - 15/81 is 265/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
70/7 = 70 × 81/7 × 81 = 5670/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
15/81 = 15 × 7/81 × 7 = 105/567 - Subtract the two like fractions:
5670/567 - 105/567 = 5670 - 105/567 = 5565/567 - After reducing the fraction, the answer is 265/27
- In mixed form: 922/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/7-30/81 70/14-15/81 70/7-45/81 70/21-15/81 70/7-75/81 70/35-15/81 70/49-15/81