Subtract 81/9 from 40/8
1st number: 5 0/8, 2nd number: 9 0/9
40/8 - 81/9 is -4/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
40/8 = 40 × 9/8 × 9 = 360/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
81/9 = 81 × 8/9 × 8 = 648/72 - Subtract the two like fractions:
360/72 - 648/72 = 360 - 648/72 = -288/72 - After reducing the fraction, the answer is -4/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8-81/9 40/16-81/9 40/8-81/18 40/24-81/9 40/8-81/27 40/8-81/45 40/56-81/9 40/8-81/63