Percentage is a number or ratio represented as a fraction of 100. Percentage can be written as whole numbers, fractions, or decimals. Percentage is denoted by the symbol (%) or abbreviated as 'pct'
Decimal point separates whole numbers from fractional parts using a dot (.). Decimal numbers consist of whole numbers and fractional parts separated by a point. Decimal point is used in daily life, like 10.50 for shirt cost
A billion is 1,000,000,000 or 10^9. It is the smallest ten-digit number in math. The abbreviation for billion is "B"
Total means an amount or complete quantity. Total can be used to express very great or complete states. Total can mean damage or have as amount
Geometric mean finds average by multiplying values and taking nth root. Product of all numbers must be written down. Use nth root based on number of values in set. Can be written as exponent 1/n for easier calculator use
Decimal numbers are anything less than 1 not expressed as fractions. Read left to right, starting with whole number before decimal point. Use "and" instead of decimal point to indicate whole numbers. Zero before decimal point means "zero"