28% of what number is 3 1/2
0.28x = 3.5
x = 3.5 / 0.28
x = 12.5
To find the number, we can set up an equation. Let's call the number "x."
We are told that 28% of the number x is equal to 3 1/2.
To calculate 28% of a number, we can multiply the number by 0.28 (as 28% is equivalent to 0.28).
So, our equation becomes:
0.28x = 3 1/2
Now, let's convert the mixed number 3 1/2 to an improper fraction.
3 1/2 can be written as (2 * 3 + 1) / 2 = 7/2.
Substituting 3 1/2 as 7/2 in the equation, we have:
0.28x = 7/2
To isolate x, we need to divide both sides of the equation by 0.28:
x = (7/2) / 0.28
Dividing 7/2 by 0.28, we get:
x ≈ 12.5
Therefore, 28% of approximately 12.5 is equal to 3 1/2.