Answer:
Discounted price: $12.9
Discounted amount: $8.1
Explanation:
Ask google what is (number%) of (value#)
^this will get you the discounted amount.
Subtract the discounted amount from the original number.
^this will get you the discounted price.
$8.40
to find discount you use part=%(whole) so you are looking for your part but know the % and whole so you do x=40%(21) and 40%, or 0.4, times 21 is 8.4 so thats your part, 8.4 is 40% of 21 and thats how much youll pay
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