-35.26% is the change from 777 to 503
Calculation steps:
[( 503 - 777 ) ÷ 777] x 100 = -35.26%
Formula
Percentage change = [(503 - 777) / 777] x 100
Subtract the new number by the original number
503 - 777 = -274
-274 ÷ 777 = -0.35263835263835264
-0.35263835263835264 x 100 = -35.26%