Please help me solve this equation

Homework: Chapter 3 Homework - Score: 0 of 5 pts 4 3 of 23 (22 complete) v > HW Score: 90%, 90 of 100 pts Text Question 1.3 35 Question Help 0- The demand curve for a good is Q = 100 - 2p. What is the elasticity at the point p = $6.00 and Q = 88? The elasticity of demand is e = . (Enter your response rounded to three decimal places and include a minus sign.)