-49.12% is the change from 511 to 260
Calculation steps:
[( 260 - 511 ) ÷ 511] x 100 = -49.12%
Formula
Percentage change = [(260 - 511) / 511] x 100
Subtract the new number by the original number
260 - 511 = -251
-251 ÷ 511 = -0.4911937377690802
-0.4911937377690802 x 100 = -49.12%