Camila was out at a restaurant for dinner when the bill came. Her dinner came to $32. After adding in a tip, before tax, she paid $40. Find the percent tip.

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?