-74.92% is the change from 307 to 77
Calculation steps:
[( 77 - 307 ) ÷ 307] x 100 = -74.92%
Formula
Percentage change = [(77 - 307) / 307] x 100
Subtract the new number by the original number
77 - 307 = -230
-230 ÷ 307 = -0.749185667752443
-0.749185667752443 x 100 = -74.92%