-13.68% is the change from 636 to 549
Calculation steps:
[( 549 - 636 ) ÷ 636] x 100 = -13.68%
Formula
Percentage change = [(549 - 636) / 636] x 100
Subtract the new number by the original number
549 - 636 = -87
-87 ÷ 636 = -0.13679245283018868
-0.13679245283018868 x 100 = -13.68%