82 1/2% of what number is 330

82.5/100 = 330/X

82.5x = 100 * 330

82.5x/82.5 = 33,000/82.5

x = 400

82 1/2% of 400 is 330

It is not a very tough question as it has all the information's required to find the necessary answer. It is already given that 82 1/2% of a certain number is 330. It is required to find the unknown number. So we have to create an equation with a single unknown number.

Let us assume the number to be = x

then we can easily write the equation as given below.

82 1/2% x = 330

(165/4) %x = 330

(165/400) x = 330

x = (330 * 400) / 165

= 2 * 400

= 800

So the unknown number is 800.