-78.05% is the change from 647 to 142
Calculation steps:
[( 142 - 647 ) ÷ 647] x 100 = -78.05%
Formula
Percentage change = [(142 - 647) / 647] x 100
Subtract the new number by the original number
142 - 647 = -505
-505 ÷ 647 = -0.7805255023183926
-0.7805255023183926 x 100 = -78.05%