-33.68% is the change from 959 to 636
Calculation steps:
[( 636 - 959 ) ÷ 959] x 100 = -33.68%
Formula
Percentage change = [(636 - 959) / 959] x 100
Subtract the new number by the original number
636 - 959 = -323
-323 ÷ 959 = -0.3368091762252346
-0.3368091762252346 x 100 = -33.68%