p=price of television before reduction
7/10 = 30% reduction as 70/100 is 7/10.
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7/10*p=$161
7p=$1,610
p=($1,610)/7
p=$230
4x=40/2, so 4x=20, so x=5, so 5*15=75
Answer:
They paid $67.45 altogether.
Step-by-step explanation:
First off, we need to set up the problem, I like to do percentage problems like this:
x/58.65 = 15/100
Cross Multiply
100x=58.65x15
When you multiply 58.65 and 15 you get 879.75
Divide
Now we have to divide 879.75 by 100 because 100x=879.75
879.75 divided by 100 is 8.80
So now we know that they paid $8.80 just for the tip.
Add
Now all we have to do is add 8.80 to 58.65
58.65 plus 8.80 is 67.45
The Kerwoods paid $67.45 altogether.