-93.03% is the change from 646 to 45
Calculation steps:
[( 45 - 646 ) ÷ 646] x 100 = -93.03%
Formula
Percentage change = [(45 - 646) / 646] x 100
Subtract the new number by the original number
45 - 646 = -601
-601 ÷ 646 = -0.9303405572755418
-0.9303405572755418 x 100 = -93.03%