-64.49% is the change from 780 to 277
Calculation steps:
[( 277 - 780 ) ÷ 780] x 100 = -64.49%
Formula
Percentage change = [(277 - 780) / 780] x 100
Subtract the new number by the original number
277 - 780 = -503
-503 ÷ 780 = -0.6448717948717949
-0.6448717948717949 x 100 = -64.49%