-37.48% is the change from 811 to 507
Calculation steps:
[( 507 - 811 ) ÷ 811] x 100 = -37.48%
Formula
Percentage change = [(507 - 811) / 811] x 100
Subtract the new number by the original number
507 - 811 = -304
-304 ÷ 811 = -0.374845869297164
-0.374845869297164 x 100 = -37.48%