we do not know how much the price of a commodity is, but it has been reduced by 10% and now costs 20€. What was the starting price?​

I got 22 because if u do 20 multiplied by 10% that gives u 2 which u then add onto the 20 to get the starting price. 10% of 22 is 2 and then 22-2 = 20 (if u we’re doing it from the starting price)