First Order Decomposition -> % of compound. Please help!!! 1. The problem statement, all variables and given/known data In a first order decomposition, the constant is 0.00313 sec-1. What percentage of the compound has decomposed after 7.17 minutes? 2. Relevant equations rate = ln[A]o - ln[A]t = kt 3. The attempt at a solution I feel bad because I have no idea how to solve this problem. My 1st test is soon to come, please help me!