-34.37% is the change from 771 to 506
Calculation steps:
[( 506 - 771 ) ÷ 771] x 100 = -34.37%
Formula
Percentage change = [(506 - 771) / 771] x 100
Subtract the new number by the original number
506 - 771 = -265
-265 ÷ 771 = -0.3437094682230869
-0.3437094682230869 x 100 = -34.37%