Ratios Flashcards
What two ways will you see you ratios written?
Fractions with a colon between the two numbers
Define ratios
Ratios express the value of one number divided into another.
2/5 or 4:5
Define ratios written as fractions
Ratio expressed with the first number as the numerator and the second number as the denominator
I.e. If four out of five dentists recommend sugarless gum, the ratio of dentists who recommend sugarless gum would be 4/5
Define common ratios
Ratios expressed with two numbers with a colon between them
I.e. The ratio of four men three women in a college class can be expressed as 4:3 (read as four men to three women)
Define percentages
Tell you how much of value is out of 100
I.e. Leaving a server $5 dollars for a total restaurant bill of $25 would be a 20% tip because the ratio of 5:25 is the same as 20:100. Both 5 and 25 are multiplied by four to get 20 and 100