-10.15% is the change from 266 to 239
Calculation steps:
[( 239 - 266 ) ÷ 266] x 100 = -10.15%
Formula
Percentage change = [(239 - 266) / 266] x 100
Subtract the new number by the original number
239 - 266 = -27
-27 ÷ 266 = -0.10150375939849623
-0.10150375939849623 x 100 = -10.15%