-75.89% is the change from 643 to 155
Calculation steps:
[( 155 - 643 ) ÷ 643] x 100 = -75.89%
Formula
Percentage change = [(155 - 643) / 643] x 100
Subtract the new number by the original number
155 - 643 = -488
-488 ÷ 643 = -0.7589424572317263
-0.7589424572317263 x 100 = -75.89%