The percentage change is -19.19%.
What is percentage change?
The percentage change (or) the percentage change of a quantity is the ratio of the difference in the quantity to its initial value multiplied by 100.
Given that, a price of £198 is decreased to £160.
Percentage change = (final - initial) amounts ÷ initial amount × 100
Percentage change = (160 - 198) / 198 × 100
= - 38 / 198 × 100
= - 19.19%
The negative is showing decrease.
Hence, the percentage change is - 19.19%