-75.74% is the change from 643 to 156
Calculation steps:
[( 156 - 643 ) ÷ 643] x 100 = -75.74%
Formula
Percentage change = [(156 - 643) / 643] x 100
Subtract the new number by the original number
156 - 643 = -487
-487 ÷ 643 = -0.7573872472783826
-0.7573872472783826 x 100 = -75.74%