-37.14% is the change from 315 to 198
Calculation steps:
[( 198 - 315 ) ÷ 315] x 100 = -37.14%
Formula
Percentage change = [(198 - 315) / 315] x 100
Subtract the new number by the original number
198 - 315 = -117
-117 ÷ 315 = -0.37142857142857144
-0.37142857142857144 x 100 = -37.14%