Question

a veterinarian needs to know an animals weight in kilograms. if 20 pounds is about 9 kilograms and a dog weighs 30 pounds, use a ratio table to find the dogs weight in kilograms

Answer 1

so, we know the weight for 20, but what we want to know is the weight for 30 pounds, that is 30/20=1.5 times more. 

So we need to multiply the number by 1.5 : 9*1.5=9+4.5=13.5

so the dog's weight in kilograms is around 13.5 kgs.