-34.42% is the change from 828 to 543
Calculation steps:
[( 543 - 828 ) ÷ 828] x 100 = -34.42%
Formula
Percentage change = [(543 - 828) / 828] x 100
Subtract the new number by the original number
543 - 828 = -285
-285 ÷ 828 = -0.3442028985507246
-0.3442028985507246 x 100 = -34.42%