[fortengc (OP)]

The price of a product is reduced hy 12%. By what percentage must
the sales grow, if the profit should he the same ?

[fortengc (OP)]

New revenue must equal old revenue
(0.88p)y = px where y is the new number of items sold
y = (px)/(0.88p)
y = x/0.88
y = 1.1364 x
----
The number of items sold must increase by 13.64%

[syhprum]

Why are we being subjected to junior school arithmetic