-77.78% is the change from 99 to 22
Calculation steps:
[( 22 - 99 ) ÷ 99] x 100 = -77.78%
Formula
Percentage change = [(22 - 99) / 99] x 100
Subtract the new number by the original number
22 - 99 = -77
-77 ÷ 99 = -0.7777777777777778
-0.7777777777777778 x 100 = -77.78%