-77.73% is the change from 642 to 143
Calculation steps:
[( 143 - 642 ) ÷ 642] x 100 = -77.73%
Formula
Percentage change = [(143 - 642) / 642] x 100
Subtract the new number by the original number
143 - 642 = -499
-499 ÷ 642 = -0.7772585669781932
-0.7772585669781932 x 100 = -77.73%