Let’s say a newspaper, BeritaHarian (printed in Selangor) costs RM0.50 in 1980 and RM1.20 in 2006. The average wage rate in printing industry in Selangor was RM3.23 per hour in 1980 and RM14.32 in 2006.

Question

Let’s say a newspaper, BeritaHarian (printed in Selangor) costs RM0.50 in 1980 and RM1.20 in 2006. The average wage rate in printing industry in Selangor was RM3.23 per hour in 1980 and RM14.32 in 2006.  
a.	By what percentage did the price of a newspaper rise?
b.	By what percentage did the wage rise?
c.	In each year, how many minutes does a worker have to work to earn enough money to buy BeritaHarian?
d.	Did workers’ purchasing power in terms of newspaper rise or fall?