-37.26% is the change from 636 to 399
Calculation steps:
[( 399 - 636 ) ÷ 636] x 100 = -37.26%
Formula
Percentage change = [(399 - 636) / 636] x 100
Subtract the new number by the original number
399 - 636 = -237
-237 ÷ 636 = -0.37264150943396224
-0.37264150943396224 x 100 = -37.26%