-76.74% is the change from 344 to 80
Calculation steps:
[( 80 - 344 ) ÷ 344] x 100 = -76.74%
Formula
Percentage change = [(80 - 344) / 344] x 100
Subtract the new number by the original number
80 - 344 = -264
-264 ÷ 344 = -0.7674418604651163
-0.7674418604651163 x 100 = -76.74%