Question

What is $99.99 With a tax of 8.25%?
Also What is $21.99 With a tax of 8.25%

Answer 1

With a tax of 8.25%, we are adding on 8.25% of the original price, $99.99, to this original price itself to get a final value.

So, 100% of the original price = $99.99
This means that 1% of the original price = $99.99/100 = $0.9999
And, 108.25% (the original price + 8.25% tax) = $0.9999 x 108.25 = $108.24

We can use a similar method with the second problem, where we add on 8.25% of $21.99 to $21.99 itself to get the final price.

So, 108.25% of the original price is: ($21.99/100) x 108.25 = $23.80