Percents in the Real World

Percents in the Real World

Simple Interest, tax, gratuities, markups, markdowns, commissions, fees, percent increase and decrease.

Simple Interest

I = P x R x T

I = Interest

P = Principle

R = Rate

T = Time

Find the Simple Interest

 Find the amount of interest earned by $8,000 invested at a 5% annual simple interest rate for 1 year.

Simple Interest

To start a mobile dog-grooming service, a woman borrowed $2,500. If the loan was for 2 years and the amount of interest was $175, what simple interest rate was she charged?

Warm Up February 9th

A student borrowed some money from his father at 2% simple interest to buy a car. If he paid his father $360 in interest after 3 years, how much did he borrow?

Sales Tax using Percents

How much sales tax can I expect to pay when I get to the register?

Warm Up Feruary 11th

Tax and Gratuity

Your parents took your family out to dinner. Your parents wanted to give the waiter a 15% tip. If the amount of the food was $42.00 and tax was 9.25%, what should be paid to the waiter as a tip?

Warm Up

February 16th

Percent Expression

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February 18th

Open Ended

The distance on the map between Yappy City and Quiet City is 23 cm. What is the actual distance between the cities?

Use the scale factor 5cm : 2 Miles