Subtract 20/81 from 12/10
1st number: 1 2/10, 2nd number: 20/81
12/10 - 20/81 is 386/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 10 × 81 = 810,
12/10 = 12 × 81/10 × 81 = 972/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
20/81 = 20 × 10/81 × 10 = 200/810 - Subtract the two like fractions:
972/810 - 200/810 = 972 - 200/810 = 772/810 - After reducing the fraction, the answer is 386/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/10-20/81 12/10-40/81 12/20-20/81 36/10-20/81 12/10-60/81 12/30-20/81 60/10-20/81 12/50-20/81 84/10-20/81 12/70-20/81