-61.07% is the change from 506 to 197
Calculation steps:
[( 197 - 506 ) ÷ 506] x 100 = -61.07%
Formula
Percentage change = [(197 - 506) / 506] x 100
Subtract the new number by the original number
197 - 506 = -309
-309 ÷ 506 = -0.6106719367588933
-0.6106719367588933 x 100 = -61.07%