Subtract 3/81 from 12/10
1st number: 1 2/10, 2nd number: 3/81
12/10 - 3/81 is 157/135.
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,
3/81 = 3 × 10/81 × 10 = 30/810 - Subtract the two like fractions:
972/810 - 30/810 = 972 - 30/810 = 942/810 - After reducing the fraction, the answer is 157/135
- In mixed form: 122/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/10-3/81 12/10-6/81 12/20-3/81 36/10-3/81 12/10-9/81 12/30-3/81 60/10-3/81 12/10-15/81 12/50-3/81 84/10-3/81 12/10-21/81 12/70-3/81