-81.91% is the change from 387 to 70
Calculation steps:
[( 70 - 387 ) ÷ 387] x 100 = -81.91%
Formula
Percentage change = [(70 - 387) / 387] x 100
Subtract the new number by the original number
70 - 387 = -317
-317 ÷ 387 = -0.8191214470284238
-0.8191214470284238 x 100 = -81.91%