Percentages 
Name: ______________________________________ Subject: _______________________ Date: _______
Write the missing word
1. Percentage
On TV or radio, we have heard that a bank has had a 7 percent of profits. That means that for every 100 coins, it has earned 7 times more and now it has 107 coins. The percentage of profit was 7%.
Another example: there was a VAT law that stipulated that all traders had to pay to the State a tax of six percent (6 %) of all sales. If a store has sold 100 Euros, it will pay 6 Euros to the state; if it had sold 200 Euros, it would have to pay 12 Euros.
You can read the lesson of how to solve problems.
Do these problems on a paper
1. I am a seller and I have a profit of 7%. How much money will I earn if I sold 200 Euros? 

2. What if I sold 400 Euros? 

3. What if I sold 500 Euros? 
2. Sales
During the year, we see sale posters in different ads. If it says 20%, this means that for every 100 coins that the product cost, the store will reduce 20 coins. If I buy a scarf that cost 100 coins and the store will reduce me 20, I have to pay 80 coins.
To find the percentage of an amount, we must multiply that percentage by the amount and then we must divide it by 100. For example: 20% of 2500 = (20 x 2500): 100 = 500. Here is another way to do it: 2500 x 0.20 = 500.
Solve these problems by assuming that the sale is 20%:
1. A store offers all its items with 20%. How much money will the store reduce me for jeans that cost 25 Euros? 

2. How much money will I pay for the previous jeans? 

3. How much money will I pay for a shirt whose original price was 18 Euros? 

4. What will be the discount of a tie that cost 10 Euros? 

5. What will be the discount of a jersey that cost 24 Euros? 

6. How much money will I pay for the previous jersey? 
3. Simple Interest
When a family earns more money than it spends, they can save the extra money in a bank or saving bank or invest it in government bonds and receive a benefit. The benefit is called interest. If we deposit 100 Euros in a saving bank and the interest rate is 2%, after 1 year we will have 102 Euros. In two years we will have 104 Euros.
The formula for the simple interest is: Interest = capital x % x years.
If we deposit 400 Euros in a bank with 3% of interest rate for 8 years, we will get an interest of: n quantities.
400 x (3/300) x 8 = 400 x 0.03 x 8 = 96. How much money will I have? The sum of 400 + 96 = 496 Euros.
Solve these problems:
1. Calculate the interest of 3400 Euros with an interest rate of 5 % for 3 years. 

2. How much will we pay for 8000 Euros with an interest rate of 7.5% for 10 years? 

3. Find the interest of 2550 Euros with an interest rate of at 4% for 4 years? 

4. How much money will I have if I deposit 8500 Euros with an interest rate of 6% for 5 years? 

5. A man has invested 10300 Euros in government bonds with an interest rate of 6.5 % for 4 years. After that time how much money will he have? 

6. A friend had 4500 Euros and he deposited them in a bank with an interest rate of 3.5% for 4 years. How much is the sum among the capital and the interest? 
4. Loans
A couple wants to get married and buy an apartment. They have savings but they need 12000 Euros, so they go to a bank to ask for a loan. They come to an agreement and the Bank grants them 12000 Euros with an interest rate of 5 % for 10 years. The couple will have to repay the capital and pay the interest.
For example: If we take a loan of 14000 Euros with an interest rate of 5 % for four years, the interest that we have to pay will be: 14000 x 0.05 x 4 = 2800 Euros. So we will have to pay those 2800 Euros plus 14000 (the amount that the bank lent). In total 16800 Euros.
Solve these problems:
1. How much money will John return to a Bank for a loan of 14000 Euros with an interest rate of 5.5% for 7 years? 

2. Peter asked for a loan to start a business with a capital of 6700 Euros with an interest rate of 4.5% for 3 years. How much money will he have to repay to the bank? 

3. I asked for a loan of 2350 Euros with an interest rate of 6% for 5 years. What interest will I pay? 

4. From the previous problem, how much money will I paid to the bank in total? 

5. John asked for a loan of 12000 Euros with an interest rate of 6.75% for 15 years. How much money will he pay for the interest? 

6. From the previous problem, how much money will he pay in total? 
 Educational applications 
Mathematics 
In Spanish  Interactive
®Arturo Ramo García.Record of intellectual property of Teruel (Spain)
No 141, of 29IX1999
Plaza Playa de Aro, 3, 1º DO 44002TERUEL