Question

If 200%of a number is 90 then what is 80% of that number? ​

Answer 1

For this case we propose a rule of three:

90 ----------> 200%

x ------------> 80%

Where the variable "x" represents the unknown number.

`x = \frac {80 * 90} {200}\\x = \frac {7200} {200}\\x = 36`

So, we have the unknown number is 36.

Answer:

The unknown number is 36.