Answer:
13.33%
Explanation:
the television originally had a price of $225, this will be our 100%.
After that, the television was at a price of $195
which means that the amount discounted was:
225 - 195 = 30
so what we must find is what percentage represent that $ 30 with respect to the $ 225
We have the following
quantity percentage
$225 ⇒ 100%
$30 ⇒ x
This can be solved by a rule of three, where we multiply the cross quantities and divide by the remaining number:

the percentage the television set was reduced is 13.33%