So you're looking for a fraction that is equivalent to 2/5, and where the numerator is 18 less than the denominator. Let's figure it out together.
If we let the denominator be "x", then the numerator would be "x - 18".
So the fraction would be (x - 18)/x.
Now, we want this fraction to be equivalent to 2/5.
To find the value of x, we can set up an equation:
(x - 18)/x = 2/5
Cross-multiplying, we get:
5(x - 18) = 2x
Simplifying, we have:
5x - 90 = 2x
Subtracting 2x from both sides:
3x - 90 = 0
Adding 90 to both sides:
3x = 90
Dividing both sides by 3:
x = 30
So the fraction that is equivalent to 2/5 and where the numerator is 18 less than the denominator is (30 - 18)/30, which simplifies to 12/30.