-33.75% is the change from 960 to 636
Calculation steps:
[( 636 - 960 ) ÷ 960] x 100 = -33.75%
Formula
Percentage change = [(636 - 960) / 960] x 100
Subtract the new number by the original number
636 - 960 = -324
-324 ÷ 960 = -0.3375
-0.3375 x 100 = -33.75%