-50.75% is the change from 67 to 33
Calculation steps:
[( 33 - 67 ) ÷ 67] x 100 = -50.75%
Formula
Percentage change = [(33 - 67) / 67] x 100
Subtract the new number by the original number
33 - 67 = -34
-34 ÷ 67 = -0.5074626865671642
-0.5074626865671642 x 100 = -50.75%