Instead of thinking about one field changing in response to the change of the other, it is more correct to say that. whenever the magnetic field is changing, so is the electric field, and vice versa.The way these fields change is governed by Maxwell's equations.This way, we do not arrive at the confusion OP has.nstead of thinking about one field changing in response to the change of the other, it is more correct to say that. whenever the magnetic field is changing, so is the electric field, and vice versa.
Gross profit = net sales â cost of goods sold. Gross profit percentage = [(net sales â cost of goods sold)/net sales] Ã 100%.
Part 2 of 2: Calculating Gross Profit Margin. 1. Divide gross profit by total revenue. Gross profit margin (sometimes just called gross margin) is different that gross profit. Gross profit margin is the ratio of your gross profit to your total revenue.It's a representation of how much money you're actually making by selling your products-if, for instance, you sell products at $20, but it costs $10 to get each product on the shelf, you're only really making $10 for each product you sell. 2.ivide gross profit by total revenue. Gross profit margin (sometimes just called gross margin) is different that gross profit. Gross profit margin is the ratio of your gross profit to your total revenue.