-45% is the change from 200 to 110
Calculation steps:
[( 110 - 200 ) ÷ 200] x 100 = -45%
Formula
Percentage change = [(110 - 200) / 200] x 100
Subtract the new number by the original number
110 - 200 = -90
-90 ÷ 200 = -0.45
-0.45 x 100 = -45%
Example