-18.4% is the change from 636 to 519
Calculation steps:
[( 519 - 636 ) ÷ 636] x 100 = -18.4%
Formula
Percentage change = [(519 - 636) / 636] x 100
Subtract the new number by the original number
519 - 636 = -117
-117 ÷ 636 = -0.18396226415094338
-0.18396226415094338 x 100 = -18.4%