-69.7% is the change from 538 to 163
Calculation steps:
[( 163 - 538 ) ÷ 538] x 100 = -69.7%
Formula
Percentage change = [(163 - 538) / 538] x 100
Subtract the new number by the original number
163 - 538 = -375
-375 ÷ 538 = -0.6970260223048327
-0.6970260223048327 x 100 = -69.7%