-68.46% is the change from 520 to 164
Calculation steps:
[( 164 - 520 ) ÷ 520] x 100 = -68.46%
Formula
Percentage change = [(164 - 520) / 520] x 100
Subtract the new number by the original number
164 - 520 = -356
-356 ÷ 520 = -0.6846153846153846
-0.6846153846153846 x 100 = -68.46%