 Let's discuss ratio. What is a ratio? A ratio is a method of comparing two or more numbers. We can write it as follows. One is to three using the double colon meaning for every one number, they also do three numbers. So they are comparing two numbers. One is to three. Or we can write it as a fraction as one over three or we can denote it as one out of three. Let's look at an example in a practical way. A company hired three females and 21 males. If we want to compare the number of females to the number of males the company has hired so that we can make decisions based on that we can calculate the ratio of females to males. The key thing here is the two. Like with the fraction. Anything before the two becomes our numerator and everything after the two becomes our denominator. So that we can represent it as a fraction. Okay, let's find the ratio of females to males. Okay, there are three females, two 21 males because the company hired three females and 21 males. Or we can write it in a fraction form and say there are three two 21 males. Three divided by 21 male. Or we can write it in a simplest form because if it's a fraction we are able to simplify it further because three can go into three one time and it goes into 27 seven times. And that becomes one over seven. Therefore it means if we have to interpret it we can say there are one female two seven males. For every female they hire they also hire seven more males this company. Or we can represent it in a wedding form. The ratio will be one to seven. Or because we can also divide the fraction and say one divided by seven gives us 0.143. Therefore it means for every 0.143 female they hire one male.