Mathemystics
Percentage changes can be tricky
In 1980 you invite 100 guests for dinner at a cost of $10 per plate. This year you invite 72% more guests but the cost per plate is 72% lower. What is the difference in your bill from 1980?
A: No change
B: 27 percent higher
C: 52 percent lower
Please leave your comment.
No doubt you have a trick here somewhere for me Gale, but my meager math says 52% lower.
From 1980 to 2018 global population increased around 72 percent while time prices decreased around 72 percent. What this means is our total global costs have decreased by 52 percent. Thomas Malthus would be astonished. I also think he would quickly admit that his “model” was wrong, that he had things backwards. Resources increase geometrical while population increases arithmetically.