The number 66 is increased to 72. What is the percentage by which the number was increased, to the nearest tenth of a percent?

The increase is 9.1%

Step-by-step explanation:

Step 1:  Make an equation

Step 2:  Divide both sides by 66

Step 3:  Find the increased

9.1%

 The increase is 9.1%

john earns $14.00 for two hours of work.

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.