-67.65% is the change from 643 to 208
Calculation steps:
[( 208 - 643 ) ÷ 643] x 100 = -67.65%
Formula
Percentage change = [(208 - 643) / 643] x 100
Subtract the new number by the original number
208 - 643 = -435
-435 ÷ 643 = -0.6765163297045101
-0.6765163297045101 x 100 = -67.65%