Answer:
$121.95
Explanation:
First, we need to change 45% into a decimal. To do that, move the decimal point two spaces back, and we will have 0.45.
Multiply that by the original price $84.10
$84.10 x 0.45 = 37.845
Then add 84.10 with 37.845
This adds up to $121.945, which you can round to $121.95