-77.68% is the change from 345 to 77
Calculation steps:
[( 77 - 345 ) ÷ 345] x 100 = -77.68%
Formula
Percentage change = [(77 - 345) / 345] x 100
Subtract the new number by the original number
77 - 345 = -268
-268 ÷ 345 = -0.7768115942028986
-0.7768115942028986 x 100 = -77.68%