-84.39% is the change from 647 to 101
Calculation steps:
[( 101 - 647 ) ÷ 647] x 100 = -84.39%
Formula
Percentage change = [(101 - 647) / 647] x 100
Subtract the new number by the original number
101 - 647 = -546
-546 ÷ 647 = -0.8438948995363215
-0.8438948995363215 x 100 = -84.39%