-32.79% is the change from 247 to 166
Calculation steps:
[( 166 - 247 ) ÷ 247] x 100 = -32.79%
Formula
Percentage change = [(166 - 247) / 247] x 100
Subtract the new number by the original number
166 - 247 = -81
-81 ÷ 247 = -0.32793522267206476
-0.32793522267206476 x 100 = -32.79%