-81.92% is the change from 647 to 117
Calculation steps:
[( 117 - 647 ) ÷ 647] x 100 = -81.92%
Formula
Percentage change = [(117 - 647) / 647] x 100
Subtract the new number by the original number
117 - 647 = -530
-530 ÷ 647 = -0.8191653786707882
-0.8191653786707882 x 100 = -81.92%