-60% is the change from 415 to 166
Calculation steps:
[( 166 - 415 ) ÷ 415] x 100 = -60%
Formula
Percentage change = [(166 - 415) / 415] x 100
Subtract the new number by the original number
166 - 415 = -249
-249 ÷ 415 = -0.6
-0.6 x 100 = -60%
Example