During the installation of a new hardwood floor, there is always some material that will be trimmed or cut due to patterns, edging, etc This is referred to as waste. All hardwood flooring requires a percentage of waste to be added for installation.
The percentage varies depending on the grade of the hardwood, variance in colour and grain, and how much material you are installing. The general rule is to add 10% for installations with less than 1,000 square feet of material and 7% for installations requiring more than 1,000 square feet.