-67.71% is the change from 641 to 207
Calculation steps:
[( 207 - 641 ) ÷ 641] x 100 = -67.71%
Formula
Percentage change = [(207 - 641) / 641] x 100
Subtract the new number by the original number
207 - 641 = -434
-434 ÷ 641 = -0.6770670826833073
-0.6770670826833073 x 100 = -67.71%