-90.29% is the change from 525 to 51
Calculation steps:
[( 51 - 525 ) ÷ 525] x 100 = -90.29%
Formula
Percentage change = [(51 - 525) / 525] x 100
Subtract the new number by the original number
51 - 525 = -474
-474 ÷ 525 = -0.9028571428571428
-0.9028571428571428 x 100 = -90.29%