-78.68% is the change from 380 to 81
Calculation steps:
[( 81 - 380 ) ÷ 380] x 100 = -78.68%
Formula
Percentage change = [(81 - 380) / 380] x 100
Subtract the new number by the original number
81 - 380 = -299
-299 ÷ 380 = -0.7868421052631579
-0.7868421052631579 x 100 = -78.68%