i don't understand how to do percentages please explain

Answer:
$60.79
Step-by-step explanation:
First take off the 30% from $78.95. That will leave you with $55.265.
Add 6% of $78.95 for sales tax (4.737) to the $55,265 = $60.002
Then add the 1% of $78.95 for local option tax (.7895) to the $60.002.
That gives you $60.7915 - round it to the nearest cent and it gives you
$60.79
Answer: $60.7915
Step-by-step explanation:
think of percents as a portion of something
if Dave has to pay 6% tax on something + 1% tax he will pay 7% tax.
This means he will pay 7% of 78.95.
In multiplication 'of' means multiply.
just use this as a rule so 7% × 78.95 will be the amount of tax he has to pay
0.07 × 78.95 = $5.5265
However, he has a 30% off coupon
so,
30% × 78.95 will give the amount he saves
.3 × 78.95 = $23.685 saved
now lets find the actual amount he saves with his coupon after taxes:
$23.685 - $5.5265 = $18.1585 saved
we can subtract this amount by the price and we will have the amount Dave has to pay for the jeans:
$78.95 - $18.1585 = $60.7915
⇒ $60.7915 is the price Dave pays
rounding we get $60 and 79 cents