-47.95% is the change from 511 to 266
Calculation steps:
[( 266 - 511 ) ÷ 511] x 100 = -47.95%
Formula
Percentage change = [(266 - 511) / 511] x 100
Subtract the new number by the original number
266 - 511 = -245
-245 ÷ 511 = -0.4794520547945205
-0.4794520547945205 x 100 = -47.95%