-98.1% is the change from 525 to 10
Calculation steps:
[( 10 - 525 ) ÷ 525] x 100 = -98.1%
Formula
Percentage change = [(10 - 525) / 525] x 100
Subtract the new number by the original number
10 - 525 = -515
-515 ÷ 525 = -0.9809523809523809
-0.9809523809523809 x 100 = -98.1%