Let's call the unknown number "x".
We can set up the equation:
18 = (40/100) * x
To solve for x, we can multiply both sides of the equation by 100/40:
18 * (100/40) = x
45 = x
Therefore, eighteen is 40% of 45.
Eighteen is 40% of what number?
Question 4 options:
75
45
22
18
1 answer