-40.77% is the change from 861 to 510
Calculation steps:
[( 510 - 861 ) ÷ 861] x 100 = -40.77%
Formula
Percentage change = [(510 - 861) / 861] x 100
Subtract the new number by the original number
510 - 861 = -351
-351 ÷ 861 = -0.4076655052264808
-0.4076655052264808 x 100 = -40.77%