Please help me with following question:
Consider two countries, Gryffindor and Slytherin. Productivity in Gryffindor relative to that in Slytherin is 0.8. The growth rate of technology in both countries is 5% per year. Gryffindor lags behind Slytherin in terms of technology by 10 years. What is the level of efficiency in Gryffindor relative to Slytherin.