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Research and compare

Percentages and electoral systems
In Italy the Chamber of Deputies is made up of 630 people, elected by the citizens.
With the proportional system, every political force presents a list of candidates and obtains a percentage of Members equal to the percentage of votes it has had throughout Italy.
For example, if a political force had 10% of the vote, it gets 63 deputies.

What would be the result if there was a "pure" majority system?

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Reflect on

The selling price of a sofa is € 1625.
Calculate how much it cost the retailer knowing that he made a profit of 28%.

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Explore options

I ask Sara to borrow me € 500 for a year.
At the end of the period will collect the amount paid increased by 4%.
Tom is available to lend me the same amount asking me at the end the amount, € 10.20 of expenses and 3% of capital as interest.
Which proposal is cheaper? Which is
the percentage advantage?

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Here you find a simple problem!

I read 320 pages of a novel, equal to 80%
of the book.
How many pages miss to the end?

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We learn together to write rational numbers in another form.