The value of sales at a shop decreases from £145000 a year to £129000. Find the percentage decrease in the values of sales.

Percentage of decrease in Sales = 11.04% or 11 %

Step-by-step explanation:

Decrease Percentage = [(Original Value - New Value) ÷ Original Value] × 100 

Percentage = [(145,000 - 129,000) ÷ 145,000] × 100

Percentage = [(16,000) ÷ 145,000] × 100

Percentage = (0.1104) × 100

Percentage of decrease in Sales = 11.04% or 11 %

The process of cause and effect involving Burmese pythons is similar to the changes in Africa in that they are both talking about how the seemingly innocent actions of humans (cause) led to greater problems in the animal ecosystems (effect).

Explanation:

The Burmese pythons are not native to the Everglades, their presence their can be traced back to the likely fact that they were the pythons (or their descendants), used as pets by humans who later released them into the wild. This action lead to the pythons adapting really well to the ecosystem and consequently hunting some of the native species close to extinction.

Similarly in Africa, humans hunted lions and leopards which drastically reduced their population, which in turn lead to a higher population of a certain type of baboon previously prey to the lions and leopards. This gave rise to a higher rates of parasites in humans and the baboons.

Thus the similarity lies in this: human action (introducing the pythons into the Everglades) in Burmese pythons in the Everglades (cause) led to the near extinction of some native species (effect) that the pythons prey on.

Also, in All the Pieces Matter, humans hunting lions and leopards (cause) led to increase in a baboon population which led to increase in parasites in the baboons and humans (effect).