-77.9% is the change from 647 to 143
Calculation steps:
[( 143 - 647 ) ÷ 647] x 100 = -77.9%
Formula
Percentage change = [(143 - 647) / 647] x 100
Subtract the new number by the original number
143 - 647 = -504
-504 ÷ 647 = -0.7789799072642968
-0.7789799072642968 x 100 = -77.9%