-78% is the change from 100 to 22
Calculation steps:
[( 22 - 100 ) ÷ 100] x 100 = -78%
Formula
Percentage change = [(22 - 100) / 100] x 100
Subtract the new number by the original number
22 - 100 = -78
-78 ÷ 100 = -0.78
-0.78 x 100 = -78%
Example