-20.3% is the change from 266 to 212
Calculation steps:
[( 212 - 266 ) ÷ 266] x 100 = -20.3%
Formula
Percentage change = [(212 - 266) / 266] x 100
Subtract the new number by the original number
212 - 266 = -54
-54 ÷ 266 = -0.20300751879699247
-0.20300751879699247 x 100 = -20.3%