-88.96% is the change from 643 to 71
Calculation steps:
[( 71 - 643 ) ÷ 643] x 100 = -88.96%
Formula
Percentage change = [(71 - 643) / 643] x 100
Subtract the new number by the original number
71 - 643 = -572
-572 ÷ 643 = -0.8895800933125972
-0.8895800933125972 x 100 = -88.96%