-76.81% is the change from 345 to 80
Calculation steps:
[( 80 - 345 ) ÷ 345] x 100 = -76.81%
Formula
Percentage change = [(80 - 345) / 345] x 100
Subtract the new number by the original number
80 - 345 = -265
-265 ÷ 345 = -0.7681159420289855
-0.7681159420289855 x 100 = -76.81%