-84.94% is the change from 644 to 97
Calculation steps:
[( 97 - 644 ) ÷ 644] x 100 = -84.94%
Formula
Percentage change = [(97 - 644) / 644] x 100
Subtract the new number by the original number
97 - 644 = -547
-547 ÷ 644 = -0.8493788819875776
-0.8493788819875776 x 100 = -84.94%