Calculating the percentage ... an increase (your gain) or a decrease (your loss) from the original investment. The dollar amount of the gain or loss is divided by the original purchase price ...

Calculate annual % change ... If negative, the result is the percentage that metric declined for the year. A positive number reflects an increase. Image source: Getty Images.

Calculate average percentage difference by subtracting, then dividing price differences. Average percentage difference helps foresee market trends and irrational periods. Understanding this metric ...

Master Excel percentages with expert hacks to save time, reduce errors, and boost confidence in your data. Learn shortcuts ...

Save guides, add subjects and pick up where you left off with your BBC account. Percentages are used in everyday life, for example, calculating discounts during sales and interest rates at banks.

It is possible to look at the difference between two numbers and work out the percentage ... increase or the percentage decrease. This is known as percentage change. Often goods are bought for one ...