Answer:Mary' s dog should loose weight between  92%-95%
Step-by-step explanation:
Step 1
Mary's dog current  weight=  185 pound
weight to loose =Between  9 and 15 pounds
 Loosing 9 pounds , the dog"s new weight will be = 185- 9= 176 pounds
also
 Loosing 15 pounds , the dog"s new weight will be = 185- 15= 170pounds
Step 2
Percentage  of weight loss to current weight when he looses 9 pounds=
= 176/185 x 100
=0.95 x100=95%
Percentage  of weight loss to current weight when he looses 15 pounds=
= 170/185 x 100
=0.9189 x100
=91.89= 92%
Therefore Mary' s dog should loose weight between  92%-95%
