-70.51% is the change from 641 to 189
Calculation steps:
[( 189 - 641 ) ÷ 641] x 100 = -70.51%
Formula
Percentage change = [(189 - 641) / 641] x 100
Subtract the new number by the original number
189 - 641 = -452
-452 ÷ 641 = -0.7051482059282371
-0.7051482059282371 x 100 = -70.51%