-77.08% is the change from 349 to 80
Calculation steps:
[( 80 - 349 ) ÷ 349] x 100 = -77.08%
Formula
Percentage change = [(80 - 349) / 349] x 100
Subtract the new number by the original number
80 - 349 = -269
-269 ÷ 349 = -0.7707736389684814
-0.7707736389684814 x 100 = -77.08%