Answer:
18€
Step-by-step explanation:
Given data
Selling price= €30
increase= 12%
Cost price= ???
We know that
% increase= selling price- cost price/cost price*100
let the cost price be x
12= 30- x/x*100
cross multiply
12*100= (30- x)100
1200= 3000-100x
1200-3000=-100x
-1800=-100x
x= 1800/100
x= 18
Hence the price before the increase is 18€
