-21.54% is the change from 636 to 499
Calculation steps:
[( 499 - 636 ) ÷ 636] x 100 = -21.54%
Formula
Percentage change = [(499 - 636) / 636] x 100
Subtract the new number by the original number
499 - 636 = -137
-137 ÷ 636 = -0.21540880503144655
-0.21540880503144655 x 100 = -21.54%