Problems about proportions, ordering quantities...

Area : Math Type : Individual Level : Third Cycle of Primary Education

• Order the following taxpayers according to the amount of money they owe in taxes, from highest to lowest: The main indicator is the value of the Interprofessional Minimum Wage (1,134 euros/month or 37.80 euros/day, depending on whether the salary is fixed by month or day).

  • María earns 85% of four times the minimum wage.

  • Santi earns three times more than the minimum wage

  • Almudena has had a raise and earns 10% more than María

  • Joan multiplies the SMI by 5, but deducts 30% of the total.

• Sergi buys a video game that costs 60 euros (VAT included). Value Added Tax (VAT) is 21% of the price. How much VAT do you pay when purchasing the video game?

• A fraudster has been investigated by the Tax Agency and found to have failed to pay 25% of the €2,000 tax he should have paid. If you are forced to pay the amount of your debt plus 150% of the amount defrauded as a fine, how much should you pay for having defrauded?

• Three unsupportive and uncivilized boys have painted the school's facade. The administrator had a budget for extraordinary expenses of €24,000. They were going to buy 24 computers for the computer classroom, because the existing ones were outdated. The cleaning of the façade cost €1,200, which had to be taken out of that budget. How many computers did the "joke" cost? And now let's apply the math: Do you think this problem is real or fictitious? How can the problem of misuse of public property be solved?