-26.09% is the change from 828 to 612
Calculation steps:
[( 612 - 828 ) ÷ 828] x 100 = -26.09%
Formula
Percentage change = [(612 - 828) / 828] x 100
Subtract the new number by the original number
612 - 828 = -216
-216 ÷ 828 = -0.2608695652173913
-0.2608695652173913 x 100 = -26.09%