To bake a cake, asri needed z eggs for every 200g of flour. If he used 1000g of flour, how many eggs dis he use?

Answer 1

5 times the flour, so 5 times the eggs
or, as a proportion,
x/1000 = z/200
x = 5z

or, as a unit conversion,
1000g * z eggs/200g = 1000z/200 = 5z eggs