-70.2% is the change from 557 to 166
Calculation steps:
[( 166 - 557 ) ÷ 557] x 100 = -70.2%
Formula
Percentage change = [(166 - 557) / 557] x 100
Subtract the new number by the original number
166 - 557 = -391
-391 ÷ 557 = -0.7019748653500898
-0.7019748653500898 x 100 = -70.2%