Of 3,600 students surveyed, 40% eat cold pizza for breakfast. How many students do not eat cold pizza for breakfast?
Use the proportion method to solve these:
You want to solve, 40% is what part of 3,600:
It asks for the students that don't eat cold pizza so subtract this from the total:
Splitting this word up into its component parts:
So for example 30 percent means that we select 100 of something and
Basically percentage is a fraction but as its name indicates the denominator is always fixed at 100.
There are two way of writing percentage. Each one means EXACTLY the same thing as the other. Sticking with the example of 30 percent. This can be written as
So we need to be able to mathematically go directly from one to the other.
As the above are EXACTLY the same thing then
Consequently when someone write:
If 40% eat pizza than (100-40)% = 60% do not eat pizza.
Thus we have: