-30.08% is the change from 266 to 186
Calculation steps:
[( 186 - 266 ) ÷ 266] x 100 = -30.08%
Formula
Percentage change = [(186 - 266) / 266] x 100
Subtract the new number by the original number
186 - 266 = -80
-80 ÷ 266 = -0.3007518796992481
-0.3007518796992481 x 100 = -30.08%