-49.25% is the change from 67 to 34
Calculation steps:
[( 34 - 67 ) ÷ 67] x 100 = -49.25%
Formula
Percentage change = [(34 - 67) / 67] x 100
Subtract the new number by the original number
34 - 67 = -33
-33 ÷ 67 = -0.4925373134328358
-0.4925373134328358 x 100 = -49.25%