-74.02% is the change from 254 to 66
Calculation steps:
[( 66 - 254 ) ÷ 254] x 100 = -74.02%
Formula
Percentage change = [(66 - 254) / 254] x 100
Subtract the new number by the original number
66 - 254 = -188
-188 ÷ 254 = -0.7401574803149606
-0.7401574803149606 x 100 = -74.02%