What is a percentage?
The word "percent" comes from the Latin phrase "per centum", which means "by the hundred". You can think of percent as meaning "out of 100". For example, 50% means "50 out of 100", which is the same as a half. Percentages are another way of expressing or showing fractional amounts.
Percentages are especially useful as they allow you to compare fractional amounts easily. They are used frequently in finance and reporting.