For this case we can make the following rule of three:
 2250 -----------> 100%
 600 -------------> x
 From here, we clear the value of x.
 We have then:
 [tex]x = (600/2250) * (100)
x = 26.66666667%[/tex]
 Therefore, the decrease in percentage weight is:
 [tex]100 - 26.66666667 = 73.33333333%
[/tex]
 Round to the nearest whole number:
 x = 73%
 Answer:
 the percent decrease in the puppy's weight rounded to the nearest whole number is:
 x = 73%