Answer:
$378
Step-by-step explanation:
Full price: 1.00($450) = $450
20% off: 0.20($450) = $90
Sale price (after 20% off): (1.00 - 0.20)($450) = 0.80($450) = $360
Final price, including tax: (1.00 + 0.05)($360) = $378
15% & 3/20
convert decimals to % by multiplying by 100
.15 * 100 = 15%
15/100
simplify
3/20
the ratio of the following x is 3/4
