Answer:
0.6 or 60%
Explanation:
The country's productivity has grown at = 3% - 2% = 1%
Physical capital per worker has grown at = 4% - 2% = 2%
How much has growing physical capital per worker contributed to productivity growth in this country?
productivity increase per 1% of increase in physical capital per worker x growth rate of physical capital per worker = 0.3 x 2% = 0.6%
0.6% / country productivity growth = 0.6% / 1% = 0.6 or 60%
