-18.24% is the change from 636 to 520
Calculation steps:
[( 520 - 636 ) ÷ 636] x 100 = -18.24%
Formula
Percentage change = [(520 - 636) / 636] x 100
Subtract the new number by the original number
520 - 636 = -116
-116 ÷ 636 = -0.18238993710691823
-0.18238993710691823 x 100 = -18.24%