Answer:
To increase a price, add the percentage you wish to increase it by to 100%, convert the percentage into a decimal by dividing by 100, then multiply this by the original price.
To decrease a price, subtract the percentage you wish to decrease it by from 100%, convert the percentage into a decimal by dividing by 100, then multiply this by the original price.
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100% represents the original price.
Therefore, 100% = $599.99
A 20% discount means that the price is now 80% of the original price,
as 100% - 20% = 80%
To find 80% of the original price, convert 80% to a decimal and multiply it by the original price:
80% = 80/100 = 0.8
Therefore, 80% of $599.99 = 0.8 x $599.99
= $479.992
Finally, we need to apply a sales tax of 6%. We can do this in 2 ways:
Way 1
Work out 6% of the discounted price, then add this to the discounted price to find the final price:
Sales tax = 6% of $479.992
= 0.06 x $479.992
= $28.79952
Final price = discounted price + sales tax
= $479.992 + $28.79952
= $508.79 (nearest cent)
Way 2
We need to increase the discounted price of $479.992 by 6%. Therefore, the final price will be 106% of the discounted price as
100% + 6% = 106%
Final price = 106% of discounted price
= 1.06 x $479.992
= $508.79 (nearest cent)