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.
Calculator Use. Calculate the gross margin percentage, mark up percentage and gross profit of a sale from the cost and revenue, or selling price, of an item. For net profit, net profit margin and profit percentage, see the Profit Margin Calculator. * Revenue = Selling Price. Margin Formulas/Calculations: The gross profit P is the difference between the cost to make a product C and the selling price or revenue R. P = R - C. The mark up percentage M is the profit P divided by the cost C to make the product.