-66.63% is the change from 836 to 279
Calculation steps:
[( 279 - 836 ) ÷ 836] x 100 = -66.63%
Formula
Percentage change = [(279 - 836) / 836] x 100
Subtract the new number by the original number
279 - 836 = -557
-557 ÷ 836 = -0.666267942583732
-0.666267942583732 x 100 = -66.63%