-29.78% is the change from 836 to 587
Calculation steps:
[( 587 - 836 ) ÷ 836] x 100 = -29.78%
Formula
Percentage change = [(587 - 836) / 836] x 100
Subtract the new number by the original number
587 - 836 = -249
-249 ÷ 836 = -0.29784688995215314
-0.29784688995215314 x 100 = -29.78%