Johnny makes $30 per hour , which is 20% of Sarah hourly rate. What is Donovan's hourly rate if he makes 50% of Sarah Hourly hourly rate ?

There are 1872 steps in a building that has 104 floors. each floor has the same number of steps. a second building has the same number of floors but 2 fewer steps between each floor. how many steps are there between each floor of the second building?