Subtract 42/10 from 6/81
1st number: 6/81, 2nd number: 4 2/10
6/81 - 42/10 is -557/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 10 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
6/81 = 6 × 10/81 × 10 = 60/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
42/10 = 42 × 81/10 × 81 = 3402/810 - Subtract the two like fractions:
60/810 - 3402/810 = 60 - 3402/810 = -3342/810 - After reducing the fraction, the answer is -557/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/81-42/10 6/81-84/10 6/81-42/20 18/81-42/10 6/81-42/30 30/81-42/10 6/81-42/50 42/81-42/10 6/81-42/70