-91.68% is the change from 613 to 51
Calculation steps:
[( 51 - 613 ) ÷ 613] x 100 = -91.68%
Formula
Percentage change = [(51 - 613) / 613] x 100
Subtract the new number by the original number
51 - 613 = -562
-562 ÷ 613 = -0.9168026101141925
-0.9168026101141925 x 100 = -91.68%