A ratio is a comparison of two numbers. Suppose we want to write the ratio of 8 and 12. We can write this as 8:12 or as a fraction 8/12, and we say the ratio is eight to twelve. The ratio of two numbers a and b is the quotient
In the 2009 Nathan's Hot Dog eating contest, Joey Chestnut ate 68 hotdogs in 10 minutes. Find how many hog dog per minute this is. The ratio is hd/min
Sussan has a bag with 3 pens, 4 pencils, 7 felt tip pens, and 1 pencil sharpener. What is the ratio of pencils to pens? Expressed as a fraction, with the numerator equal to the first quantity and the denominator equal to the second, the answer would be 4/3. Two other ways of writing the ratio are 4 to 3, and 4:3.
Proportion An equation in which two ratios are equal is called a proportion. Two ratios and are a proportion when Remember the two ratios are equals if their cross products are equal a·d = b·c You can also use the cross product to find a missing number:
Solve:
Find x to get a proportion .
