-74.75% is the change from 305 to 77
Calculation steps:
[( 77 - 305 ) ÷ 305] x 100 = -74.75%
Formula
Percentage change = [(77 - 305) / 305] x 100
Subtract the new number by the original number
77 - 305 = -228
-228 ÷ 305 = -0.7475409836065574
-0.7475409836065574 x 100 = -74.75%