Percents. Hmmm....
1. Which of the following calculations will tell you the percent increase of a value that changed from 120 to 135?
a. (135-120)/120
b. (135-120)/135
c. 1-(120/135)
d. (135/120)-1
2. Pat exercised for a month, and her weight changed from 150 lbs to 140 lbs. By what percent did her weight decrease?
3. Mike's bank ballance changed from $2500 at the beginning of one month to $1900 at the beginning of the next month. Find the percent that fills the blank in the following statement:
Mike's bank ballance is _______% of the ballance last month.
4. A. Kara's emporium applied a 25% markup on the wholesale price of decorative candles. If the wholesale price of a candle is $1.30, what price are they being sold for at Kara's?
B. Kara's is having a sale on the candles described in part A, where they are being sold at wholesale prices. What pencent decrease is this from the usual selling price?
5. The price of Fred's favorite cereal increased from $1.75 to $2.10. By what percent did it increase?
6. The amount of phosphorous dissolved in the water of a certain lake increased from .015 mg/L to .048 mg/L. By what percent did the phosphorous increase?
7. A. In the month of February, the gross income (receipts) of Kara's emporium was $21,500. In March, the gross income was $20,000. By what percent did the gross income decrease fom February to March?
B. In April, the gross income was back up to what it was in February ($21,500). By what percent did the gross income increase from March to April?