-70.94% is the change from 647 to 188
Calculation steps:
[( 188 - 647 ) ÷ 647] x 100 = -70.94%
Formula
Percentage change = [(188 - 647) / 647] x 100
Subtract the new number by the original number
188 - 647 = -459
-459 ÷ 647 = -0.7094281298299846
-0.7094281298299846 x 100 = -70.94%