-18.88% is the change from 784 to 636
Calculation steps:
[( 636 - 784 ) ÷ 784] x 100 = -18.88%
Formula
Percentage change = [(636 - 784) / 784] x 100
Subtract the new number by the original number
636 - 784 = -148
-148 ÷ 784 = -0.18877551020408162
-0.18877551020408162 x 100 = -18.88%