The net profit margin ratio is an accounting ratio that is used to determine the percentage of profit that your company can generate from total revenue. Then divide that number by the first of the two amounts. You need to calculate how much you use your cellphone and internet for business and how much you used for personal use.
Use technology to expand the reach of your company.
Your records show that your five day care children and your own child use the swing set one hour a day five days a week. Multiply the result by 100 to get the percent sales growth. Divide this number by last years operating income and multiply by 100. For example if your home is 2000 square feet and your home office is 400 square.