-31.39% is the change from 927 to 636
Calculation steps:
[( 636 - 927 ) ÷ 927] x 100 = -31.39%
Formula
Percentage change = [(636 - 927) / 927] x 100
Subtract the new number by the original number
636 - 927 = -291
-291 ÷ 927 = -0.313915857605178
-0.313915857605178 x 100 = -31.39%