Define what is meant by the term ratio. Compare and contrast rates, proportions,

A relationship between two numbers that expresses how many times the first number contains the second is known as a ratio.
For instance, the proportion of oranges to lemons in a bowl of fruit is eight to six if there are eight oranges and six lemons (that is, ${\displaystyle 8÷6}$, which is equivalent to the ratio ${\displaystyle 4÷3}$). 
Rate refers to the relationship between the change in one variable and the change in another. Speed, for instance, is the rate at which a distance changes as time changes.
A percentage is a claim that demonstrates the equality of ratios, e.g. ${\displaystyle 1÷2=3÷6}$ 
A portion's proportion to the whole is measured by a percentage, which is frequently represented in terms of how many of something there are for every 100. A circumstance where the proportion of boys in the group is equal to 50% is when there are half girls and half boys in the group.
Using a ratio, you can compare two amounts of the same thing, for example, if my supply of apples to your supply of apples equals${\displaystyle 1÷2}$, it means that for every 1 apple | have, you have 2. Ratios can also be expressed as fractions, e.g. ${\displaystyle 1÷2}$ is ${\displaystyle \frac{1}{2}}$. 
A rate compares two quantities of different units, e.g. mph or km/h. ${\displaystyle midfmid}$ travel at a speed of 65 mph, it means for every 1 hour, I have travelled 65 miles, spending an hour for every 65 miles.