-78.36% is the change from 305 to 66
Calculation steps:
[( 66 - 305 ) ÷ 305] x 100 = -78.36%
Formula
Percentage change = [(66 - 305) / 305] x 100
Subtract the new number by the original number
66 - 305 = -239
-239 ÷ 305 = -0.7836065573770492
-0.7836065573770492 x 100 = -78.36%