Answer
a) 1233%
b) 587.2%
c) 1970--2.68 minutes, 2011--5.2 minutes
d)Yes, the purchasing power in terms of newspapers fell for workers.
Work Step by Step
a)
increase = (new - old)/old*100
$(2-.15)/.15*100$
$1.85/.15*100$
$12.33*100$
$1233$%
b)
$(23.09-3.36)/3.36*100$
$19.73/3.36*100$
$5.872*100$
$587.2$%
c)
$.15*60/3.36$
$9/3.36$
$2.678$
$2.68$
$2*60/23.09$
$120/23.09$
$5.197$
$5.2$
