-78.61% is the change from 921 to 197
Calculation steps:
[( 197 - 921 ) ÷ 921] x 100 = -78.61%
Formula
Percentage change = [(197 - 921) / 921] x 100
Subtract the new number by the original number
197 - 921 = -724
-724 ÷ 921 = -0.7861020629750272
-0.7861020629750272 x 100 = -78.61%