Type Firm 1966 1970 1974 Petroleum 11.2 9.3 12.7 Drugs 10.8 9.4 12.2 Chemicals 8.0 5.0 8.2 Motor Vehicles 6.2 2.4 2.7 Electrical 4.8 3.3 3.9 Food 2.7 2.5 2.8

Which industry had the greatest percentage increase in profits as a percentage of sales between 1970 and 1974?

What was the percentage increase?

(12.7-9.3) : 9.3) * 100=36.56%

((12.2-9.4) : 9.4) * 100=29.79%

(8.2-5.0) : 5.0) * 100=64%

(2.7-2.4) : 2.4) * 100=12.5%

(3.9-3.3) : 3.3) * 100=18.18%

(2.8-2.5) : 2.5) * 100=12%

P: 11.2 / 12.7 =.86 - 1 = 13.2%

D: 10.8 / 12.2 =.88 - 1 = 11.4%

C: 8.0 / 8.2 =.97 - 1 = 2.4%

M: 2.7 / 6.2 =.43 - 1 = - 56.4%

E: 3.9 / 4.8 =.81 - 1 = - 18.7%

F: 2.7 / 2.8 =.96 - 1 = 3.5%

P through C plus F all start with lower numbers then go to higher while M and E start with the higher numbers that is why they are positive and not negative