# Finding the final amount given the original amount and a percentage increase or decrease Online Quiz

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Q 1 - A library collected $48.00 in fees every month. But in April they increased the fees by 20%. What is the fees the library collects in May? ### Answer : A ### Explanation Step 1: Present library fees =$48

Percent increase = 20%;

Step 2:

Increase in fees = 0.2 × 48 = $9.60 So, Fees collected in May =$48 + $9.60 =$57.60

Q 2 - Normally a game costs $40.00. A new special edition version is going to cost 18% more. What is the cost of the new special edition version? ### Answer : C ### Explanation Step 1: Cost of present edition of game =$40

Increase in cost = 18% of $40 = 0.18 × 40 =$7.20

Step 2:

So, cost of new special edition of game = $40 +$7.20 = $47.20 Q 3 - Vincent has$1680 in the bank. If the bank pays a 15% rate of interest per annum, what is the amount in his bank after one year?

### Explanation

Step 1:

Money in bank account = $1680 Rate of interest = 15% per annum Step 2: Interest = 15% of$1680 = 0.15 × 1680 = $252 Amount in the bank after one year =$1680 + $252 =$1932

Q 4 - The price for internet on a cell phone was $16 a month, but starting in January the price will be increased by 20%. What will be the new price? ### Answer : B ### Explanation Step 1: Price of internet on phone =$16

Percent increase in price = 20% of $16 Step 2: Increase = 0.2 × 16 =$3.20

New price of internet = $16 +$3.20 = $19.20 Q 5 - Bernie's family were paying$96.00 for the TV, internet and phone, but a new connection was offered for a discount of 22% on earlier price. How much are they paying for the new connection?

### Explanation

Step 1:

Present price of TV, internet, phone = $96 Increase = 22% of$96 = 0.22 × 96 = $21.12 Step 2: New price = 96 – 21.12 =$74.88

Q 6 - A bank charged 36% p.a. interest on loans given. If a person borrowed $1600 dollars, how much would he end up paying in total? ### Answer : D ### Explanation Step 1: Principal =$1600; Rate of interest p.a. = 36%

Interest = 36% of $1600 =$576

Step 2:

Amount at the end of year = $1600 +$576 = $2176 Q 7 - A store was selling lawn chairs for$42. The store further offered a 12% markdown on the price of the chair. How much would a chair now cost?

### Explanation

Step 1:

Price of lawn chair = $42 Markdown = 12% of$42 = 0.12 × 42 = $5.04 Step 2: Price after discount =$42 – $5.04 =$36.96

Q 8 - Last year a trade license cost $56.00. There is a decrease of 30% in license fee. How much the license will cost this year? ### Answer : C ### Explanation Step 1: Cost of trade license last year =$56

Decrease in price = 30% of $56 = 0.3 × 56 =$16.80

Step 2:

Price of license this year = 56 – 16.80 = $39.20 Q 9 - Silvia ordered a dress online that cost her 60. The package arrived little damaged so the seller took 18% off the price. How much did she end up paying? ### Answer : A ### Explanation Step 1: Original price of dress =$60

Discount given = 18% of $60 = 0.18 × 60 =$10.80

Step 2:

Actual amount paid for dress = $60 −$10.80 = $49.20 Q 10 - A furniture store had a table that cost$72. After some time, the owner offered 12% off the price. How much is the table now?

Price of the table = $72 Discount offered = 12% of$72 = 0.12 × 72 = $8.64 Step 2: Price after discount =$72 − $8.64 =$63.36