-37.11% is the change from 811 to 510
Calculation steps:
[( 510 - 811 ) ÷ 811] x 100 = -37.11%
Formula
Percentage change = [(510 - 811) / 811] x 100
Subtract the new number by the original number
510 - 811 = -301
-301 ÷ 811 = -0.3711467324290999
-0.3711467324290999 x 100 = -37.11%