Q: How do you solve percent problems using proportions?
A: Generally, there are 3 main parts to a percent problem: the percent, the part and the total.
The set up is the same for all problems:
part/total = percent/100
(remember, percent means per 100, so it is always out of 100)
Example 1: Finding the percent:
What percent is 75 of 85?
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Q: The total cost of a holiday package to a warm climate in January can be modeled using the formula C=x+0.12x+0.15x+38. C is the total cost in dollars. x is the list price of the package in dollars. 0.12 is the tax rate, 12%. 0.15 is the service charge rate,15%. 38 is the airport tax in dollars. Find the list price when the total cost of the holiday package is $3338.73.
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