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.
To calculate the gross profit margin as a percent, you need to know the revenues and the cost of the goods sold. 1  1. Subtract the total costs of your goods from the revenues the sales generate to find your gross profit. 2  2. Divide your gross profit by your total revenue generated. In this example, you would divide $1,800 by $11,800 to get 0.15. 3. Multiply the result from Step 2 by 100 to find the gross profit margin percentage. Finishing the example, you would multiply 0.15 by 100 to find that your gross profit margin equals 15 percent.