-36.36% is the change from 99 to 63
Calculation steps:
[( 63 - 99 ) ÷ 99] x 100 = -36.36%
Formula
Percentage change = [(63 - 99) / 99] x 100
Subtract the new number by the original number
63 - 99 = -36
-36 ÷ 99 = -0.36363636363636365
-0.36363636363636365 x 100 = -36.36%