-66.18% is the change from 819 to 277
Calculation steps:
[( 277 - 819 ) ÷ 819] x 100 = -66.18%
Formula
Percentage change = [(277 - 819) / 819] x 100
Subtract the new number by the original number
277 - 819 = -542
-542 ÷ 819 = -0.6617826617826618
-0.6617826617826618 x 100 = -66.18%