-77.76% is the change from 643 to 143
Calculation steps:
[( 143 - 643 ) ÷ 643] x 100 = -77.76%
Formula
Percentage change = [(143 - 643) / 643] x 100
Subtract the new number by the original number
143 - 643 = -500
-500 ÷ 643 = -0.7776049766718507
-0.7776049766718507 x 100 = -77.76%