During 2016 the price of a good increased by 8%. In the sales on 1 January 2017 all items are reduced by 25%

(a) If the sale price of the good is $688.50, find the original price at the beginning of
2014.
(b) Find the overall percentage change.
(c) What percentage increase would be needed to restore the cost to the original price
prevailing on 1 January 2016? Give your answer to one decimal place