Subtract 40/10 from 3/81
1st number: 3/81, 2nd number: 4 0/10
3/81 - 40/10 is -107/27.
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,
3/81 = 3 × 10/81 × 10 = 30/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
40/10 = 40 × 81/10 × 81 = 3240/810 - Subtract the two like fractions:
30/810 - 3240/810 = 30 - 3240/810 = -3210/810 - After reducing the fraction, the answer is -107/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/81-40/10 3/81-80/10 3/81-40/20 9/81-40/10 3/81-40/30 15/81-40/10 3/81-40/50 21/81-40/10 3/81-40/70