-91.51% is the change from 601 to 51
Calculation steps:
[( 51 - 601 ) ÷ 601] x 100 = -91.51%
Formula
Percentage change = [(51 - 601) / 601] x 100
Subtract the new number by the original number
51 - 601 = -550
-550 ÷ 601 = -0.9151414309484193
-0.9151414309484193 x 100 = -91.51%