What are hidden questions and why are they important when solving multiple step problems

The price of a coat increased from $78 to $92. what is the price increase percentage?

Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00