-79.38% is the change from 388 to 80
Calculation steps:
[( 80 - 388 ) ÷ 388] x 100 = -79.38%
Formula
Percentage change = [(80 - 388) / 388] x 100
Subtract the new number by the original number
80 - 388 = -308
-308 ÷ 388 = -0.7938144329896907
-0.7938144329896907 x 100 = -79.38%