Answer:
The absolute change is found by taking the final value−initial value=absolute change.
7.8−12.1=−4.3
The relative change is found by taking the absolute change initial value=relative change.
−4.312.1=−0.35537
Change the decimal to a percent by multiplying by 100%.
−0.35537⋅100%=−35.537%
Round to the nearest hundredth of a percent to get −35.54%.