Subtract 6/81 from 12/8
1st number: 1 4/8, 2nd number: 6/81
12/8 - 6/81 is 77/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
12/8 = 12 × 81/8 × 81 = 972/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
6/81 = 6 × 8/81 × 8 = 48/648 - Subtract the two like fractions:
972/648 - 48/648 = 972 - 48/648 = 924/648 - After reducing the fraction, the answer is 77/54
- In mixed form: 123/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/8-6/81 12/8-12/81 12/16-6/81 36/8-6/81 12/8-18/81 12/24-6/81 60/8-6/81 12/8-30/81 12/40-6/81 84/8-6/81 12/8-42/81 12/56-6/81