It makes sense to calculate their percentage overages next. Using the same math, the materials cost was 5.4% over budget, and the equipment rental was 4.7% over budget.

We want to calculate the percentage of annual decline. First, we divide the most current revenue number by the beginning revenue number, $10 million divided by $15 million. That comes to 0.667.

Here's how to calculate your take-home pay as a percentage of your gross pay to see how much of your hard-earned money is actually going into your pocket. Image source: Getty Images.

Percentage change is a simple calculation used for many purposes in finance and business, such as to judge the relative performance of a stock or other investment.

This turns out to be great news since it makes lots of percentages easy to calculate. In particular, it’s easy to calculate 10% of any number since that’s just 1/10 of the number.

Round off deductions to the nearest dollar. Calculate Medicare taxes (1.45 percent in 2011) and social security deductions (4.2 percent in 2011) based on employees' wages.

It makes sense to calculate their percentage overages next. Using the same math, the materials cost was 5.4% over budget, and the equipment rental was 4.7% over budget.