50% of what number is 30
30 * 0.5 = ?
Think of it this way:
30 is half of what number?
You should be able to do that "in your head"
let the number be x then,
50% of x = 30
(50/100)* x = 30
0.5 x = 30
x = 30/0.5
x = 60
50% of 60 is 30
To find the number that represents 50% of a given value, you can set up a proportion to solve for the unknown number.
Let's assume the unknown number is represented by "x".
The proportion can be set up as follows:
50% / 100% = 30 / x
To solve the proportion, you can cross-multiply:
50x = 30 * 100
Next, simplify the equation:
50x = 3000
Now, divide both sides of the equation by 50:
x = 3000 / 50
x = 60
Therefore, 50% of 60 is equal to 30.