-80% is the change from 165 to 33
Calculation steps:
[( 33 - 165 ) ÷ 165] x 100 = -80%
Formula
Percentage change = [(33 - 165) / 165] x 100
Subtract the new number by the original number
33 - 165 = -132
-132 ÷ 165 = -0.8
-0.8 x 100 = -80%
Example