SOLUTION: if there are 20 questions on a test and amy gets an 80% how many questions did she get correct? What is the formula for finding this answer? Thanks

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Question 957221: if there are 20 questions on a test and amy gets an 80% how many questions did she get correct? What is the formula for finding this answer? Thanks
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
the formula is:

x/20 = .8

using this formula, you solve this equation as shown below:

x/20 = .8
multiply both sides of this equation by 20 to get:
x = 20*.8
simplify to get:
x = 16
confirm by replace x with 16 in your original equation to get:
16/20 = .8