The New York Times cost $0.15 in 1970 and $2.00 in 2011. The average wage in manufacturing was $3.36 per hour in 1970 and $23.09 in 2011. By what percentage did the price of a newspaper rise? By what...

The New York Times cost $0.15 in 1970 and $2.00 in 2011. The average wage in manufacturing was $3.36 per hour in 1970 and $23.09 in 2011.
By what percentage did the price of a newspaper rise?
By what percentage did the wage rise?
In each year, how many minutes did a worker have to work to earn enough to buy a newspaper?
Did workers’ purchasing power in terms of newspapers rise or fall?