-80% is the change from 525 to 105
Calculation steps:
[( 105 - 525 ) ÷ 525] x 100 = -80%
Formula
Percentage change = [(105 - 525) / 525] x 100
Subtract the new number by the original number
105 - 525 = -420
-420 ÷ 525 = -0.8
-0.8 x 100 = -80%
Example