math help please

Question

72 is what percent of 480? Write and solve and equasion to solve the problem.

Answer 1

Percent may be expressed with a % sign:    12%

Percent may be expressed as a fraction:      5/6

Percent may be expressed as a decimal:     0.20

 

What is the %?       x%

What is the fraction?              72/480

What is the decimal?            (we could calculate it)

 

 

Here we have two values (great for a fraction):    72/480  = 15% = 3/20 = 0.15

 

Now, we can write:  72 is 15% of 480

and check that (because "of" usually means multiply):

    Is  72 = 15% of 480    ?

          72 = (15/100)*480   ?

          72 = 72   ? yes