A true proportion is an equation that states that two ratios are equal. If you know one ratio in a proportion, you can use that information to find values in the other equivalent ratio
when you work with prepotion you have to find the constant rate of change like this chart
y=x or 1=65 to check if this is true you have to divided 130/2 or 65 which means normally you would do this for all the numbers but I just did one to make it short.
