-34.81% is the change from 770 to 502
Calculation steps:
[( 502 - 770 ) ÷ 770] x 100 = -34.81%
Formula
Percentage change = [(502 - 770) / 770] x 100
Subtract the new number by the original number
502 - 770 = -268
-268 ÷ 770 = -0.34805194805194806
-0.34805194805194806 x 100 = -34.81%