Percent literally means
"out of 100."
If a student gets 75 percent on a test
or quiz, this is the equivalent of receiving 75 questions correct
out of 100.
We can calculate percent using
Definition: A ratio
is the comparison of two measurements by division (or by a fraction
A proportion is two
equivalent ratios, which are written as fractions.
Example: If Betsy gets 3 problems correct out of 4, what
percent did she correct?
3 x 100 = 4 x P
P (P represents the percent correct)
Cross multiplication will set up an equation to solve for the
300 = 4P
300÷4 = 4P÷4
(divide each side by 4)
75 = P
Therefore, Betsy got 75 % correct.