-95.65% is the change from 644 to 28
Calculation steps:
[( 28 - 644 ) ÷ 644] x 100 = -95.65%
Formula
Percentage change = [(28 - 644) / 644] x 100
Subtract the new number by the original number
28 - 644 = -616
-616 ÷ 644 = -0.9565217391304348
-0.9565217391304348 x 100 = -95.65%