Answer:
23.3%
Step-by-step explanation:
Wow, that's definitely a confusing way to teach it. Let me help you understand it:
7 is what percent of 30? This is:
7 / 30 or [tex]\frac{7}{30}[/tex]
We are going to do cross multiplication to find the missing value, X.
[tex]\frac{x}{100} =\frac{7}{30}[/tex]
30 * X = 100 * 7
30X = 700
X = [tex]\frac{700}{30}[/tex]
X = 23.3 % is the missing value
