Sometimes a radio program is added to the carrier in such a way that the program signal causes fluctuations in the carrier's frequency. This is called frequency modulation (FM). Another way of sending a radio signal is to make the peaks of the carrier wave bigger or smaller.
Calculating the percentage profit made. It is also possible to work out the percentage profit that is made on a deal. This is done using the profit and the price that something cost originally, before it was sold on (the Cost Price). Percentage Profit = (profit/cost price) x 100%. The next example shows how this is done. Example.
Calculating Profit Margin. To calculate your profit margin, divide your profit by the amount of your gross sales. For example, if your company sells $100,000 worth of product and has $70,000 worth of expenses, then your profit is $30,000 and your profit margin is 30 percent, or $30,000 divided by $100,000.