-70.14% is the change from 556 to 166
Calculation steps:
[( 166 - 556 ) ÷ 556] x 100 = -70.14%
Formula
Percentage change = [(166 - 556) / 556] x 100
Subtract the new number by the original number
166 - 556 = -390
-390 ÷ 556 = -0.7014388489208633
-0.7014388489208633 x 100 = -70.14%