How are translations and reflections represented as a function

What does it mean by solve the exponential equation for x?

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

27 is what percent of 108? 27 is % of 108