-36.25% is the change from 309 to 197
Calculation steps:
[( 197 - 309 ) ÷ 309] x 100 = -36.25%
Formula
Percentage change = [(197 - 309) / 309] x 100
Subtract the new number by the original number
197 - 309 = -112
-112 ÷ 309 = -0.36245954692556637
-0.36245954692556637 x 100 = -36.25%