Percent Proportion and Simple Interest

Ann puts $300 in a bank account earning 4% interest.  How much will she earn in interest in 1 year?

Principal = $800
Interest Rate = 3.5%
Time = 6 months
Find the interest earned.

You lend $240 to your friend.  He pays you back $270.  What interest rate did you charge your friend?

What does the "p" in the interest formula stand for?

Find 72% of 58.

What percent of 85 is 510?

(a)  

17% of what number is 68?

(a)  

After 3 years the simple interest earned annually on an investment of $5000 was $1200. Use the simple interest formula I = Prt to find the interest rate to the nearest tenth of a percent.

(a)  

The cost of Javon’s school supplies was $49.80. He had a coupon for 30% off the entire purchase. What was the discount?

(a)  

The ​ (a)   is the percent by which a quantity increases or decreases from the original amount.