-51.01% is the change from 198 to 97
Calculation steps:
[( 97 - 198 ) ÷ 198] x 100 = -51.01%
Formula
Percentage change = [(97 - 198) / 198] x 100
Subtract the new number by the original number
97 - 198 = -101
-101 ÷ 198 = -0.51010101010101
-0.51010101010101 x 100 = -51.01%