Subtract 10/81 from 70/30
1st number: 2 10/30, 2nd number: 10/81
70/30 - 10/81 is 179/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
70/30 = 70 × 27/30 × 27 = 1890/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
10/81 = 10 × 10/81 × 10 = 100/810 - Subtract the two like fractions:
1890/810 - 100/810 = 1890 - 100/810 = 1790/810 - After reducing the fraction, the answer is 179/81
- In mixed form: 217/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/30-20/81 70/60-10/81 70/30-30/81 70/90-10/81 70/30-50/81 70/30-70/81