Subtract 81/8 from 2/40
1st number: 2/40, 2nd number: 10 1/8
2/40 - 81/8 is -403/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
2/40 = 2 × 1/40 × 1 = 2/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
81/8 = 81 × 5/8 × 5 = 405/40 - Subtract the two like fractions:
2/40 - 405/40 = 2 - 405/40 = -403/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/40-81/8 2/80-81/8 2/40-81/16 6/40-81/8 2/40-81/24 10/40-81/8 2/40-81/40 14/40-81/8 2/40-81/56