-71.62% is the change from 511 to 145
Calculation steps:
[( 145 - 511 ) ÷ 511] x 100 = -71.62%
Formula
Percentage change = [(145 - 511) / 511] x 100
Subtract the new number by the original number
145 - 511 = -366
-366 ÷ 511 = -0.7162426614481409
-0.7162426614481409 x 100 = -71.62%