-91.56% is the change from 604 to 51
Calculation steps:
[( 51 - 604 ) ÷ 604] x 100 = -91.56%
Formula
Percentage change = [(51 - 604) / 604] x 100
Subtract the new number by the original number
51 - 604 = -553
-553 ÷ 604 = -0.9155629139072847
-0.9155629139072847 x 100 = -91.56%