-66.3% is the change from 828 to 279
Calculation steps:
[( 279 - 828 ) ÷ 828] x 100 = -66.3%
Formula
Percentage change = [(279 - 828) / 828] x 100
Subtract the new number by the original number
279 - 828 = -549
-549 ÷ 828 = -0.6630434782608695
-0.6630434782608695 x 100 = -66.3%