3. A snowmobile manufacturer claims that its newest model is 15% lighter than last year's model. If this year's model weighs 799 lb., how much did last year's model weigh?

We can calculate this by setting up a proportion:

x/100=799/85 so we multiply 799 by 100 receiving 79900 then we divide 79900 by 85 and receive 940. So last years model weighs 940 lb.