Answer:
Decrease by 5%
Explanation:
Data provided in the question:
CPI in 2016 = 200
CPI in 2017 = 210
Constant wage rate = $10 an hour
Now,
CPI change during the period = [ CPI in 2016 ÷ CPI in 2017 ] × 100%
= [ 200 ÷ 210 ] × 100%
= 95.23% ≈ 95%
Hence,
The the real wage rate will decrease by (100% - 95%) i.e 5%