Unit 2. English problems

Problem 1. On the Nike website they have 20% sales, I bought some sneakers and saved €15. How much were the shoes worth? How much did they cost me?

(Author: Nº29)

Problem 1 solution

In 1st place: We know that €15 is 20% of the value. To find out 100% of the value, we will only have to multiply 15x5= €75.

At this price, we subtract the €15 75-15=€60 that they cost me.

Problem 2. A man has just won the lottery, specifically 400,000 euros. Of those 400,000, he invests 300,000 in a bank account with a fixed interest rate of 5%. How much money has the man won int he curse of one year? (Author: Nº16)

Problem 2 solution

The first thing is to find what 5% of 300,000 is: 300,000 · 5 = 1,500,000 we divide it by 100 = 15,000; the final result will be 15,000 euros of profit.

Solution: You have earned 15,000 euros of profit in one year.

Problem 3.One morning Lázaro and the blind man went to the market with 70 whites and wanted to buy a merchant a wine that cost 80 whites, the merchant, feeling sorry for them, decided to discount it by 20%. Do Lázaro and the blind man have enough white to buy the wine? Do you have any leftover white? (Author nº20)

Problem 3 solution

1º) We calculate the discount that the merchant made them:

80x20=1600;

1600/100=16 white

2º) We deduct it from the initial price (80)

80-16=64

3º) To know if they had any left, we subtracted the whites that the blind man and Lázaro (70) brought from the merchant's discount (64)

70-64 = 6

Solution: Yes, you can buy the wine because it lowered 16 whites, costing them 64 whites and they have 4 whites left over.

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