Final answer:
To find out how much the dog weighed last time, we can set up an equation using the given information. Let x be the weight of the dog last time. We know that the current weight, 54.3 kilograms, is 9.5% less than the previous weight. Solving the equation, we find that the dog weighed approximately 60 kilograms last time.
Step-by-step explanation:
To find out how much the dog weighed last time, we can set up an equation using the given information. Let x be the weight of the dog last time. We know that the current weight, 54.3 kilograms, is 9.5% less than the previous weight. This can be expressed as:
x - 0.095x = 54.3
Simplifying the equation, we have:
0.905x = 54.3
Dividing both sides of the equation by 0.905, we get:
x ≈ 60 kilograms
Therefore, the dog weighed approximately 60 kilograms last time.