Subtract 81/18 from 40/10
1st number: 4 0/10, 2nd number: 4 9/18
40/10 - 81/18 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
40/10 = 40 × 9/10 × 9 = 360/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
81/18 = 81 × 5/18 × 5 = 405/90 - Subtract the two like fractions:
360/90 - 405/90 = 360 - 405/90 = -45/90 - After reducing the fraction, the answer is -1/2
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