Answer:
90%
Step-by-step explanation:
An easy way that I use to use to get percentages was get the denominator to equal 100. Anything over 100 would be the percentage, that's the way I was taught.
You multiply by [tex]\frac{5}{5}[/tex] to get the denominator, 20, to equal 100
[tex]\frac{18}{20}[/tex] × [tex]\frac{5}{5}[/tex] = [tex]\frac{90}{100}[/tex]
[tex]\frac{90}{100}[/tex] = 90%
