F) The marked price of a radio is 25 % above the selling price and the cost pr 30 % less than its marked price. Find the discount percent and gain percent.

See explanation below.

Step-by-step explanation:

Let's say, represents the sale price of radio.

Then the marked price of the radio is

The cost price of the radio is

The discount is simply 25% because the radio is being sold at 25% less then the marked price.

The gain percent is given as:

The radio is being sold at 12.5% gain.

Best Regards!

25% is the answer