Answer:
$97.20
Step-by-step explanation:
Let P = the percentage, x = the bill before tax, and y = the amount of tax
Here I am using the formula P%*x=y.
So, first we replace the variables with their values: 8% * 90 = y
Now we divide 8 by 100 to turn it into a decimal*, which is 0.08: 0.08 * 90 = y
(*Why 100, instead of 10 which would give us 0.8? Because 0.8 is equal to 80%, and here we need 8%.)
Next, we multiply these two terms: 7.2 = y
Therefore, the tax is $7.20. However we still need to add this to the total: 90+7.2
And that equals 97.2. Now we add a dollar sign and a 0 on the end (does not change the value) so it is a proper monetary value: $97.20
