I organized an ocean cleanup and we collected a total of 25 pounds of garbage.16 pounds of garbage consisted of plastic.What percent of the garbage was plastic?
The answer is
In order to find out the percentage from a situation, we must set up two ratios.
is the equation you will have to use to find the percentage of how much is made out of plastic. The first way is to use cross-multiply. Meaning you will have to multiply
The second way to see if it's correct is by dividing
Percentage can be written in two ways. Although they look different they both mean the same thing.
Example: 30 percent
Percentage really is a special fraction. What makes it special is that the bottom number (denominator) is ALWAYS 100.
All the plastic collected weighed 25 pounds
Of this there was 16 pound of plastic
The amount of plastic expressed as a fraction of the whole is
We need to change this to percentage so the bottom number (denominator) has to end up as being 100.
Multiply by 1 and you do not change the value. However, 1 comes in many forms.
Think of this as
Think of % as being the same as