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4) 600

Using the equation 450=0.75(x)

you find x and you get 600 since it needs to be 75% of a number to be 450

6) 500

Using the equation 75=0.15(x)

You find  and you get 500

xchynax
Question 1)
if 450 is 75% that must mean:

(450÷3=150)(75%÷3=25)

150 equals 25%

25%+75% equals 100% so 450 (75%)+150 (25%) must equal 600.

the answer is 600.

Question 2)
500

hopefully this is helpful♡♡~~chyna

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good job