-90.32% is the change from 527 to 51
Calculation steps:
[( 51 - 527 ) ÷ 527] x 100 = -90.32%
Formula
Percentage change = [(51 - 527) / 527] x 100
Subtract the new number by the original number
51 - 527 = -476
-476 ÷ 527 = -0.9032258064516129
-0.9032258064516129 x 100 = -90.32%