A Number is decreased by 45% to 528. what is the original amount?

960

Step-by-step explanation:

The Original is unknown.

528 is only 55% of the original value (as 45% was removed).

It is called the Unitary Method What i am going to do now:

528/55 = 9.6

We divided by 55, as we wanted to be left with only 1% of the orignal so we can times by 100, and get 100% of the original value.

So now we know that 1% of the total is 9.6.

To find 100%, we times this value by 100, and therefore we get:

9.6 x 100 = 960

This is our answer. If you still don't understand what I have done here, search google for the unitary method and there are plenty of videos on google for further understanding.