Question

the product of two number is 52.8 if one of them is 8.25 find the other

Answer 1

Whenever you get to solve such questions, your first step should always be considering a variable which may be any alphabet of English such as a, b, c, x, y, z, etc.

Here,
Let us consider/assume the required number x.

According to question,
When 8.25 is multiplied with a number we get 52.8

We can derive an expression from the above sentence which is as follows:
8.25 * x = 52.8
x = 52.8/8.25

On solving we get,
x = 6.4

Hence,
The other number will surely be 6.4