-20.68% is the change from 266 to 211
Calculation steps:
[( 211 - 266 ) ÷ 266] x 100 = -20.68%
Formula
Percentage change = [(211 - 266) / 266] x 100
Subtract the new number by the original number
211 - 266 = -55
-55 ÷ 266 = -0.20676691729323307
-0.20676691729323307 x 100 = -20.68%